The trigonometric Identity is verified. $(1-sin~α)(1+sin~α)=1-sin^2α=cos^2α$
Work Step by Step
We have that: $cos^2α+sin^2α=1$ $cos^2α=1-sin^2α$ So: $(1-sin~α)(1+sin~α)=1-sin^2α=cos^2α$
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