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sinθ

cosθ

tanθ

cscθ

secθ

cotθ

Pythagorean Identity of Trig

Pythagorean Identity ➗ cos2θ

Pythagorean Identity ➗ sin2θ

cos(-θ) = ? even or odd

sin(-θ) = ? even or odd

tan(-θ) = ? even or odd
