Question

if sin^-1x+sin^-1y=2pi/3 then cos ^-1x+cos^-1y=

Answer 1

1/sinx+1/siny=2pi/3
so sinx+siny=3/2pi

Answer 2

sin(90-x)+sin(90-y)=3/2pi

Answer 3

cosx+cosy=3/2pi

Answer 4

1/cosx+1/cosy=2pi/3

Answer 5

First of all, \(\large \sin^{-1}x \color{Red}{\ne} \dfrac{1}{\sin x}\)

Answer 6

\(\large \sin^{-1}x\) is an inverse function, NOT a reciprocal, okay ?