SOLUTION: im confused on how to evaluate (sin30)^2 - (cos30)^2 can someone help?

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Question 910463: im confused on how to evaluate (sin30)^2 - (cos30)^2 can someone help?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

(sin30)^2 - (cos30)^2

(1/2)^2 - (√3/2)^2 = 1/4 - 3/4 = -1/2

(cos, sinx) Unit circle Reference

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