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How do you simplify the expression $\frac{1 - {cos}^{2} t}{1 + cos t}$ $(1-cos^2t)/(1+cost)$ ?

1 Answer

Nov 1, 2016

Just factor.

$\Rightarrow \frac{(1 + cos t) (1 - cos t)}{1 + cos t}$ $=>((1 + cost)(1 - cost))/(1 + cost)$

$\Rightarrow 1 - cos t$ $=> 1- cost$

Hopefully this helps!

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