geometry - Proving Sin Cos Tan - Mathematics Stack Exchange
By A Mystery Man Writer
Description
I am asked to prove the following: $$\dfrac{1-\cos x}{\sin x}=\dfrac{\sin x}{1+\cos x}=\tan\dfrac x2.$$
Looking at the answer
I am not able to see what is going on here:
$$\frac{1 - \cos(x)}{\s
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