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Other People Who Read Radians : Example: Converting radians to degrees Also Read


 
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Basic trigonometric ratios : Example: Solving a 30-60-90 triangle

By: Sal Khan, Monterey Institute for Technology and Education

This worked example can be done without trigonometry, but we do show how knowledge of 30-60-90 triangles can be helpful when evaluating trig functions

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Unit circle definition of trigonometric functions : Unit Circle Ma...

By: Sal Khan

Walk-through of the Khan Academy Unit Circle Manipulative.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Radians : Example: Radian measure and arc length

By: Sal Khan

Worked example that thinks about the relationship between an arc length and the angle that is subtended by the arc.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Graphs of trig functions : Graphing trig functions

By: Sal Khan

Analyzing the amplitude and periods of the sine and cosine functions.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Graphs of trig functions : More trig graphs

By: Sal Khan

Determining the equations of trig functions by inspecting their graphs.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Graphs of trig functions : Example: Graph of cosine

By: Sal Khan, Monterey Institute for Technology and Education

Basic interpretation of the graph of the cosine function

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Long live Tau : Pi Is (still) Wrong.

By: Sal Khan

Please excuse the simple math and spelling errors. You shouldn't believe anything I say without double-checking even at the best of times.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Inverse trig functions : Example: Calculator to evaluate inverse t...

By: Sal Khan, Monterey Institute for Technology and Education

Example using calculator to evaluate inverse tangent function

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Unit circle definition of trigonometric functions : Trigonometry w...

By: Sal Khan

The second part of the problem of the off-track ship captain

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Radians : Example: Converting degrees to radians

By: Sal Khan, Monterey Institute for Technology and Education

Worked example to help understand how we covert radians to degrees

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Graphs of trig functions : Example: Graph, domain, and range of si...

By: Sal Khan, Monterey Institute for Technology and Education

Graphing a sin curve to think about its domain and range.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Unit circle definition of trigonometric functions : Unit circle de...

By: Sal Khan

Extending SOH CAH TOA so that we can define trig functions for a broader class of angles

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Radians : Radians and degrees

By: Sal Khan

What a radian is. Converting radians to degrees and vice versa.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Inverse trig functions : Inverse Trig Functions: Arctan

By: Sal Khan

Understanding the arctan or inverse tangent function.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Unit circle definition of trigonometric functions : Example: Using...

By: Sal Khan, Monterey Institute for Technology and Education

Worked example using our knowledge of 30-60-90 triangles and similarity to evaluate tan, cos and sin.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Read More
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Graphs of trig functions : Example: Amplitude and period

By: Sal Khan, Monterey Institute for Technology and Education

Determining the amplitude and period of a trig function

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Read More
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Basic trigonometric ratios : Example: Using soh cah toa

By: Sal Khan, Monterey Institute for Technology and Education

Worked example evaluating sine and cosine using soh cah toa definition.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Read More
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Graphs of trig functions : Graph of the sine function

By: Sal Khan

Using the unit circle definition of the sine function to make a graph of it.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Inverse trig functions : Inverse Trig Functions: Arccos

By: Sal Khan

Understanding the inverse cosine or arccos function

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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Unit circle definition of trigonometric functions : Ferris Wheel T...

By: Sal Khan

Part 2 of the ferris wheel problems. Graph of h(t)=9-8cos(18t)

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

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