Question

Cota=15/8,evaluate (2+2sina)(1-sina)/(1+cosa)(2-2cosa)

Answer 1

Answer:

(2+2 sin A) (1-sin A)/(1+cos A) (2-2 cos A)

= 2(1+sin A) (1-sin A)/2(1+cos A) (1-cos A)

= (1-sin2A)/(1-cos2A)

= cos2A/sin2A

= cot2A

= 225/64

Step-by-step explanation: