You can put this solution on YOUR website! Given:
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Use the identity:
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and on the right side substitute for to get:
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The denominator contains 1. Replace 1 with an equivalent to make the equation
become:
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Notice now that the two terms in the denominator both have the common denominator
of . Because they have the common denominator their numerators can be added over
that common denominator to get:
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Note that on the right side you are dividing by the fraction
To divide by a fraction you can invert the fraction and multiply. This converts the problem
to:
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On the right side cancel the terms in the denominator and numerator:
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Notice that with this set of cancellations the right side now equals the left side of
the equation. Therefore, the original problem has been proven.
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Hope this helps you to understand trig a little better.
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