document.write( "Question 1037215: A point P(x,y) is shown on the unit circle corresponding to a real number t. Find the values of the trigonometric functions at t. The point P is Upper P left parenthesis StartFraction 15 Over 17 EndFraction comma eight seventeenths right parenthesisP
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Algebra.Com's Answer #651921 by Edwin McCravy(20060) $\"\"$ $\"About$

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document.write( "The length t is the length of the red arc.\r\n" );
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document.write( "Draw a perpendicular from the point  to the\r\n" );
document.write( "x-axis. Label it Q, and label the origin O. Then draw the radius OP.\r\n" );
document.write( "The radius of the unit circle is 1. {In green below].\r\n" );
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document.write( "  \r\n" );
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document.write( "In geometry, you learned that a central angle is measured by the\r\n" );
document.write( "arc it subtends.  So the central angle is also measured t.\r\n" );
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document.write( "Triangle OPQ is a right triangle. \r\n" );
document.write( "The side opposite angle t is PQ.\r\n" );
document.write( "Also PQ is the y-coordinate of P, so PQ = 8/17.\r\n" );
document.write( "The side adjacent to angle t is OQ.\r\n" );
document.write( "Also OQ is the x-coordinate of P, so OQ = 15/17.\r\n" );
document.write( "The radius OP is the hypotenuse, so OP = 1.\r\n" );
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document.write( " <-- the y-coordinate of P\r\n" );
document.write( " <-- the x-coordinate of P\r\n" );
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document.write( "Edwin

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