what is the trigonometric identity for ( half angle) sin^2x= EMERGENCY last thing I need to know before my test.. Please help guys.. Well appreciative

Question

what is the trigonometric identity for ( half angle) sin^2x=  EMERGENCY last thing I need to know before my test.. Please help guys.. Well appreciative

shane_b · Answer

Google :) http://tutorial.math.lamar.edu/pdf/Trig_Cheat_Sheet.pdf

anonymous · Answer

im not allowed to open that up.. theres a lock on my computer.. can u help me shane.

shane_b · Answer

The lock isn't working well if you're allowed here then :P

$$sin^2 \theta=\frac{1}{2}(1=cos(2 \theta))$$

shane_b · Answer

Typo in there...that should have been: $$sin^2 \theta=\frac{1}{2}(1-cos(2 \theta))$$

anonymous · Answer

thanks bro

anonymous · Answer

and lol it just prevents me from opening stuff up