Question

sqrt(2) Cos (x) = Tan(x)

Answer 1

Helpp

Answer 2

:S

Answer 3

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

solve for sin x
find x

Answer 4

How would I solve for x from that step?

Answer 5

I've gotten up to that step by myself and i'm just stuck

Answer 6

its a quadratic equation - use quadratic formula

sin x = [-1 +/- sqrt(1 - 4* sqrt2 * -sqrt2)] / 2*sqrt2

Answer 7

thanks! I didn't see that

Answer 8

yw