i'm trying to study for a test and i'm having trouble understanding how to solve these, my textbook doesn't really cover this very well. could someone please help me?
solve for x:
Hello yaykittyeeeInverse trig functions are always a pain. Get rid of them as soon as you can. Here's the first one:
Let . So
Let . So
And the original equation becomes:But
So
Solve this for by squaring both sides. You get a quadratic, one of whose roots is not valid. The other is the answer to the question (which is ).
Number 2 is a bit trickier, but start it in the same way. Let:i.e.Then say:
i.e.
i.e.and:Then solve the equation in .
(substitute to get everything in terms of )
Do you want to have another go now?
Grandad