Aron Pierce

2023-01-18

How to simplify the expression $\left(1-\mathrm{cos}\theta \right)\left(1+\mathrm{cos}\theta \right)$?

Royce Mathis

$\left(1-\mathrm{cos}\theta \right)\left(1+\mathrm{cos}\theta \right)$
= $1-{\mathrm{cos}}^{2}\theta$
= ${\mathrm{sin}}^{2}\theta$

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