# Math Help - Trig tangent problem

1. ## Trig tangent problem

Solve the following equations for 0 (less than or equal to) x (less than or equal to) 2pi.

tan x = sq.rt.(3) - 2

cos x = 1/7. I know one of the answers is 1.43, how do I get the others?

Any help would be greatly appreciated. Thanks.

2. Originally Posted by LJstone

cos theta = 1/7. I know one of the answers is 1.43, how do I get the others?
You have the answer in the first quadrant? What other quadrant is cosine positive in? The 4th quadrant correct! Now use the identity to solve for $\theta$ in this quadrant.