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trigonometric functions (1 Viewer)

cossine

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Jul 24, 2020
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HSC
2017
For pictures 3 and 4 make sure to review related angles.

make sure to remember the unit circle definitions of trigonometric functions.

sin theta = y
cos theta = x
tan theta = y/x

How can you use these definitions to answers questions 3/4

The answers given in picture 4 c/d is incorrect.

Using identities like sin^2 theta + cos^2 theta = 1 7, 9, 10

You can find a list of trigonometric identities on khan academy all you got do is apply them
 

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