Trigonometry Examples

Start on the left side.
Convert to sines and cosines.
Apply the reciprocal identity to .
Write in sines and cosines using the quotient identity.
Simplify .
Combine the numerators over the common denominator.
Apply pythagorean identity.
Reduce the expression by cancelling the common factors.
Because the two sides have been shown to be equivalent, the equation is an identity.
is an identity

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