document.write( "Question 1108657: How do you evaluate 3 sin^4 90° + 4cos^3 180° ? \n" ); document.write( "

Algebra.Com's Answer #723660 by ikleyn(52834) $\"\"$ $\"About$

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document.write( "sin(90°) = 1.\r\n" );
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document.write( "cos(180°) = -1.\r\n" );
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document.write( "Therefore,  3*sin^4(90°) + 4*cos^3(180°) =  = 3*1 + 4*(-1) = 3 - 4 = -1.\r\n" );
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