document.write( "Question 834731: How do you evaluate the six trigonometric functions of theta.
\n" ); document.write( "a. theta= 90
\n" ); document.write( "b. theta= -1pi \n" ); document.write( "
Algebra.Com's Answer #503303 by stanbon(75887)\"\" \"About 
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How do you evaluate the six trigonometric functions of theta.
\n" ); document.write( "a. theta= 90
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\n" ); document.write( "Look at a unit circle centered on (0,0).
\n" ); document.write( "90 degrees intersects the circle at (0,1)
\n" ); document.write( "x = 0 ; y = 1, and r = 1 because you have a unit circle
\n" ); document.write( "sin(t) = y/r = y = 1
\n" ); document.write( "cos(t) = x/r = x = 0
\n" ); document.write( "tan(t) = y/x = 1/0 is undefined
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\n" ); document.write( "csc, sec, and cot are the inverse of sin, cos, tan
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\n" ); document.write( "b. theta= -1pi
\n" ); document.write( "The point on the unit circle is (-1,0)
\n" ); document.write( "x = -1, y = 0, r = 1
\n" ); document.write( "sin(t) = y = 0
\n" ); document.write( "cos(t) = x = -1
\n" ); document.write( "tan(t) = y/x = 0
\n" ); document.write( "---
\n" ); document.write( "csc, sec, and cot are the inverse of sin, cos, tan
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\n" ); document.write( "cheers,
\n" ); document.write( "Stan H.\r
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