document.write( "Question 769960: 1) Find all t in the interval [0, 2π] satisfying 2(sin t)2 − 3 sin t + 1 = 0\r
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\n" ); document.write( "\n" ); document.write( "2) Find all t in the interval [0, 2π] satisfying (cos t)2 − 8 cos t + 7 = 0. \r
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Algebra.Com's Answer #469203 by josgarithmetic(39621) $\"\"$ $\"About$

You can put this solution on YOUR website!
Do you mean this: $\"+2%28sin+t%29%5E2+-+3+sin+t+%2B+1+=+0+\"$ ?\r
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\n" ); document.write( "\n" ); document.write( "Quadratic equation in sin(t).
\n" ); document.write( " $\"sin%28t%29=%283%2B-sqrt%289-4%2A2%29%29%2F4\"$
\n" ); document.write( " $\"sin%28t%29=%7B3%2B-sqrt%281%29%29%2F4\"$
\n" ); document.write( " $\"sin%28t%29=%283%2B-1%29%2F4\"$
\n" ); document.write( " $\"sin%28t%29=1%2F2\"$ or $\"sin%28t%29=1\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"t=pi%2F3\"$ or $\"t=2%2Api%2F3\"$ or $\"t=pi\"$
\n" ); document.write( "Through referring to the unit-circle. \n" ); document.write( "

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