Question

Derive Cot 112°.Cot 158°

Answer 1

Answer:

cot 112 = cot (90+22) = -tan 22 [ cot (90 + A) = - tan A]

cot 158 = cot ( 180 - 22) = - cot 22

putting these values in the given equation

- tan 22 × - cot 22

- tan 22 × 1/- tan 22 [ cot A = 1/tan A]

= 1 Answer