document.write( "Question 1079851: Use the characteristics of f(t) = sin t to find the value of sin t when t=-21π/4 I badly need your help :-( as I dont really know how to solve this.
\n" ); document.write( "here are the choices to choose from
\n" ); document.write( "a. sin t = 0
\n" ); document.write( "b. sin t = 1
\n" ); document.write( "c. sin t = -√2/2
\n" ); document.write( "d. sin t = √2/2 \n" ); document.write( "

Algebra.Com's Answer #694101 by ikleyn(52799) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "The angle  is geometrically equivalent to  =  = ,\r\n" );
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document.write( "which, in turn, is geometrically equivalent to\r\n" );
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document.write( " =  = ,\r\n" );
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document.write( "which, in turn, is simply the same as .\r\n" );
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document.write( "The function sine is periodical with the period of , therefore,\r\n" );
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document.write( " =  =  =  = .\r\n" );
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