The following expression is equal to.
cot85° + cos75°
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. tan5° + sin15°.
We have, cot 85° + cos 75°
⇒ cot(90° - 5°) + cos(90° - 15°).
⇒ tan 5° + sin 15°
Thus,
⇒ cot 85° + cos 75° = tan 5° + sin 15°