Question

Express cot85°+tan75° in terms of trigonometric ratios of angle brtween0°and45°

Answer 1

Cot(90 - 5) + tan (90- 15)

Tan5 + cot 15

It's the answer

Answer 2

Heya!!

cot 85° + tan 75°

= cot(90 - 5) + tan (90- 15)

Since, cot(90 - theta ) = tan theta

tan (90 - theta) = cot theta

= tan 5° + cot 15°

Hence, Above expression is expressed in angle between 0° and 45°.

Hope it helps uh :)