Question

If Sec 2A=cosec(A_
30deg) then find the value of angle a

Answer 1

Answer:

Step-by-step explanation:

We know that sec A=cosec(90°-A)

Now given that sec 2A=cosec(A-30°)

Or cosec(90°-2A)=cosec(A-30°)

Or, 90°-2A=A-30°

Or, 90°+30°=A+2A

Or, 3A=120°

Or, A=120°÷3=40°

Therefore A=40° (answer)