Question

Find exact value of tan(x+y) if cscx=5/3 for 0 12 years ago

Answer 1

Are you allowed to use a calculator? There are two ways to do this.

Answer 2

Umm only for arithmetic.

Answer 3

But I can't just plug in trig functions into my calc for values

Answer 4

OK. Remember that tan(x+y) = (tanx + tany)/(1 - tanxtany)

Answer 5

I think I have to use some identities. I have some double angle identities, and half angle identities.

Answer 6

Alright

Answer 7

You have been given cos(y) = 5/13. Do you know how to make a triangle out of this ratio?

Answer 8

Yes. but what quadrant should I draw it in. because it says 0<y<pi/2

Answer 9

and why is one them x and the other y.

Answer 10

That x has a different triangle associated with it!