Question

if sec2A = cosec A -42 findA

Answer 1

So When We Solve this Question,we get:- Sec 5A=Sec 90-(A-36) Therefore,Sec 5A=Sec (90-A+36) Sec 5A=Sec (126-A) Therefore,5A=126-A 6A=126 A=2

Answer 2

Hello..

= Sec 2A = cosec (A-42°)

= cosec(90°-2A) = cosec (A-42°)

= 90°-2A = A-42°

= 90°+42° = A+2A

= 132° = 3A

= 132\ 3 = A

= 44° = A

Hope it helps....