document.write( "Question 960601: if cos theta = 7/25 and theta is not acute, find the value of tan 1/2 theta \n" ); document.write( "

Algebra.Com's Answer #587059 by Edwin McCravy(20060) $\"\"$ $\"About$

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cos theta = 7/25 and theta is not acute, find the value of tan 1/2 theta
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document.write( "So we will need .  So we will need the identity:\r\n" );
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document.write( "Since q is not acute, it is not in the 1st quadrant and the only other quadrant\r\n" );
document.write( "that the cosine is positive in is the 4th quadrant.  The sine is negative in\r\n" );
document.write( "the 4th quadrant, so the identity uses the - sign:\r\n" );
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document.write( "Multiply top and bottom by 25\r\n" );
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document.write( "Edwin

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