tan^2(30) - cos^2(45)

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12873

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Guest Feb 11, 2015

+129845

+5

Best Answer

tan^2(30) - cos^2(45)

tan 30 = 1/√3 cos 45 = 1 / √2

So

tan^2(30) - cos^2(45) = (1/√3)^2 - (1/√2)^2 = 1/3 - 1/2 = -1/6

CPhill Feb 11, 2015

CPhill · Answer 1 · 2015-02-11T02:58:25

tan^2(30) - cos^2(45)

tan 30 = 1/√3 cos 45 = 1 / √2

So

tan^2(30) - cos^2(45) = (1/√3)^2 - (1/√2)^2 = 1/3 - 1/2 = -1/6