Question

if sin^-1x=π/5, then cos^-1X is equal to​

Answer 1

Answer:

sin-1 x = π / 5

sin-1 x + cos-1 x = π / 2

(π / 5) + cos-1 x = π / 2

cos-1 x = (π / 2) – (π / 5)

cos-1 x = [5π – 2π] / 10

= 3π / 10

Answer 2

see above solution, I was solved step by step .