Question

 sec 5A = cosec (A + 15°), where 5A is an acute angle, then what is the value of A?​

Answer 1

ANSWER:

=> sec 5A = Cosec(A+15)

=> Cosec(90-5A) = Cosec (A+15)

=> 90-5A = A+15

=> 90-15 = 5A+A

=> 75 = 6A

=> 75/6 = A

=> 25/2 = A