- #1
NanoChrisK
- 14
- 0
Homework Statement
Does [sin(θ/2)-cos(θ/2)]^2 equal 1 for all values of θ?
I need to figure this out to solve a physics problem.
Homework Equations
sin^2(A)+cos^2(A)=1
The Attempt at a Solution
[sin(θ/2)-cos(θ/2)]^2
=sin^2(θ/2)+cos^2(θ/2)
=1
But this isn't what I get when I put f(x)=[sin(θ/2)-cos(θ/2)]^2 in my graphing calculator. What's going on?