can someone help in prove the identity:
is equal to tan2 θ2sin2 θ1+cos2
in english 2sin sqaured theta divided by 1 + cos2 eqauls to tan squared theta
any help by great
The left-hand-side is expressed in terms of sine and cosine.
We can also express the right-hand side in terms of sine and cosine...
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is common to both sides, so divide both sides by
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Divide both sides by 2.
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Now you only need determine if the denominators are equal...