Use an identity to write each expression as a trig function value or as a single number. 1-2sin^2(22 1/2 degrees) and 1/4 - 1/2 sin^2 (47.1 degrees) Thanks for reading!
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Hello Thatoneguy12345 Originally Posted by Thatoneguy12345 Use an identity to write each expression as a trig function value or as a single number. 1-2sin^2(22 1/2 degrees) and 1/4 - 1/2 sin^2 (47.1 degrees) Thanks for reading! These both use the identity 1) 2) , and you can't simplify this any further. Grandad
wait for the first one, how did you get cos45? I begin with 1 - 2 sin ^ 2 (22 1/2) and I end up multiplying the 22 with 1/2 and getting 11. So I end up with 1-2sin^2 11. Is that the correct step? NVM I get it! Thanks a lot
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