Question

I need help with the inverse of si, cos, & tan.

So far on one problem I've gotten
sinX = 29/14
where do I go from here? I know you have to use cos^-1, but how? Can anyone work this one problem out for me to see how to do it?

THANKS!

Answer 1

you know sin^2 + cos^2=2, so then solve for cosX.

But I have a problem with what you have already. How can sin of any angle be greater than 1? (29/14) is greater than 1.