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Geometry

Fundamental Trigonometric Identities

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, \(a=(7, 0)\) and \(b=(0, -12).\) 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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