document.write( "Question 990339: If the point P begin ordered pair negative fraction numerator 3 over denominator 5 end fraction comma y end ordered pair lies on the unit circle and P is in the second quadrant, what does y equal? \n" ); document.write( "

Algebra.Com's Answer #610358 by josgarithmetic(39630) $\"\"$ $\"About$

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(-3/5,y) on the UNIT CIRCLE; what is y?\r
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\n" ); document.write( "\n" ); document.write( "The x and y coordinate values are the cosine and sine function values, and you have the Pythagorean Theorem relationship, $\"cos%5E2%28theta%29%2Bsin%5E2%28theta%29=1\"$ . No real concern needed for $\"theta\"$ , just that you have the cosine value given but want to find the y value for the point on the unit circle. Here, this means to find y or the SINE of the angle. You want the POSITIVE value because, \"second quadrant\" or quadrant Number 2.\r
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\n" ); document.write( "\n" ); document.write( " $\"cos%28theta%29=-3%2F5\"$ ; now use the identity to calculate $\"sin%28theta%29\"$ . \n" ); document.write( "

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