document.write( "Question 1161413: If cos x= -15/17 with x in quadrant III, find the exact value of sin 2x and the quadrant of 2x \n" ); document.write( "

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\n" ); document.write( "If cos x= -15/17 with x in quadrant III, find the exact value of sin 2x and the quadrant of 2x
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You may be able to recognize this TRIG function as an 8-15-17 PYTHAG. TRIPLE.
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document.write( "We have: 
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document.write( "As x is in QIII, we get: y = O = - 8, and so, 
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document.write( "Can you now tell which quadrant 2x lies in? \n" );
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