Math  /  Trigonometry

Question2. Rewrite each expression as a single trigonometric ratio, and then evaluate the ratio. a) tan170tan1101+tan170tan110\frac{\tan 170^{\circ}-\tan 110^{\circ}}{1+\tan 170^{\circ} \tan 110^{\circ}} b) cos5π12cosπ12+sin5π12sinπ12\cos \frac{5 \pi}{12} \cos \frac{\pi}{12}+\sin \frac{5 \pi}{12} \sin \frac{\pi}{12}

Studdy Solution
Evaluate cosπ3\cos \frac{\pi}{3}:
cosπ3=12\cos \frac{\pi}{3} = \frac{1}{2}
The solutions are: a) 3\sqrt{3} b) 12\frac{1}{2}

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