Question

can anyone help me solve tanx = cosx im having a bit of trouble

Answer 1

sinx / cosx = cos x
sin x = cos^2 (x)
sin x = 1 - sin^2 (x)
sin ^2 (x) + sin x - 1 = 0

Answer 2

Can you continue from here on? :)

Answer 3

make sin x = y and solve it quadratically.

Answer 4

I've gotten to that stage and that's where I have trouble, I end up with sin^x + sinx - 1 = 0 which can't be factorised, is there a different way of doing it?

Answer 5

you have to use the quadratic formula :)

Answer 6

oh okay, thanks