document.write( "Question 811472: Prove:
\n" ); document.write( "sin 2x csc x = 2 cos x \n" ); document.write( "

Algebra.Com's Answer #488750 by htmentor(1343) $\"\"$ $\"About$

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Using the trig identity, sin(2x) = 2sin(x)cos(x), and remembering that csc(x) = 1/sin(x), the LHS becomes:
\n" ); document.write( "sin(2x) csc(x) = 2sin(x)cos(x)/sin(x) = 2cos(x) \n" ); document.write( "

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