Question

5
If sec 4A = cosec(A - 20°) where 4A is acute and A > 20°. then 3A =
(a) 630
(b) 69°
(c) 66°
(d) 88°​

Answer 1

Step-by-step explanation:

answer-c I hope this could help you all

Answer 2

Answer:

Sec 4A=cosec(A-20)

Sec(90-4A)=cosec(A-20°)

Cosec (90-4A)=cosec(A-20)

90-4A=A-20

-5A=-110

A=22°

3A= 3×22

3A=66°