Question

if sec2alpha = cosec ( alpha - 24 ° ) , then the value of alpha is :- A) 35 B) 37 C) 36 D) 38​

Answer 1

Answer:

Correct option is

A (44°)

Step-by-step explanation:

Given, sec2A=cosec(A−42∘)

[∵secθ=cosec(90∘−θ)]

⇒cosec(90∘−2A)=cosec(A−42∘)

⇒(90∘−2A)=(A−42∘)

⇒90∘+42∘=A+2A

⇒132∘=3A

⇒A=44∘