发布日期 ： 2019-04-29 14:20:17 UTC
分类 ： Algebraic
Trigonometric power reduction formula:
\(sin^2θ = 1 − cos^2θ\)
\(cos^2θ = 1 − sin^2θ\)
\(tan^2θ + 1 = sec^2θ\)
\(tan^2θ = sec^2θ − 1\)
\(1 + cot^2θ = csc^2θ\)
\(cot^2θ = csc^2θ − 1\)
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