Geometry

Trigonometric Co-Function Identities

Which of the following is equal to

$\cot ( 90 ^ \circ - \theta) ?$

Given that $$\tan N ^ \circ = \frac { 1} { \tan 30 ^\circ}$$, where $$0 \leq N < 180$$, what is the value of $$N$$?

Which of the following is the same as $$\sin (-769^{\circ})?$$

In the above graph, $$a=(0, 7)$$ and $$b=(-12, 0).$$ What is the value of $\cos(-\theta)+\sin(180^{\circ} - \theta)?$

Which of the following is equal to

$\cos \left( \frac{\pi}{2} -2 \theta \right)?$

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