How do I solve this problem?

Solve for cosθ in sin^2θ + cos^2θ = 1

Question

How do I solve this problem? 

Solve for cosθ in sin^2θ + cos^2θ = 1

terenzreignz · Answer

This?
$$\large \sin^2\theta+\cos^2\theta=1$$

anonymous · Answer

yes

terenzreignz · Answer

Well, let's see...
How to break this to you...
cosθ can literally be any value from [-1 , 1]
Let me explain... the value of cosθ depends on the value of θ, right?

anonymous · Answer

yes

terenzreignz · Answer

Well, unfortunately (fortunately?)
ANY value of θ would make this statement true
sin²θ + cos²θ = 1

hartnn · Answer

he/she needs to solve for cos
so, subtract sin^2 term from both sides, what u get ?

terenzreignz · Answer

Oops...  Must have been overexcited :)
My bad

anonymous · Answer

Im trying to write it but its giving me a hard time

anonymous · Answer

±√(1 + sin2Θ)

hartnn · Answer

did you mean $\pm \sqrt{1-\sin^2 \theta}$ ??

anonymous · Answer

yes I pasted the wrong one Sorry, my computer is acting really crazy today

hartnn · Answer

ohh..if you meant that, then you are correct.

anonymous · Answer

ok thanks you made this very easy, thank you.. :)

hartnn · Answer

glad to hear :) welcome ^_^