SOLUTION: Find the exact value of the following without calculators: Sin^2 225degrees-cos^2 300 degrees

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Question 1090932: Find the exact value of the following without calculators:
Sin^2 225degrees-cos^2 300 degrees
Answer by ikleyn(52785) About Me  (Show Source):
You can put this solution on YOUR website!
.
sin(225°) = -sqrt%282%29%2F2.  Hence,  sin^(225°) = 1%2F2.

cos(300°) = sqrt%282%29%2F2.   Hence,  cos^2(300°) = 1%2F2.


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