Anonymous

# PROBLEM-SOLVING Find the EXACT expressions for the indicated quantities, given that: ?

Update:

I still don't understand

### 1 Answer

Relevance

- PuzzlingLv 72 months ago
Hint:

Use this trig identity first:

sin²x + cos²x = 1

Also use this rule:

tan x = sin x / cos x

And finally remember adding 2π radians to an angle doesn't change the value of sin and cos.

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