document.write( "Question 1110430: If , evaluate $\"+cos%5E2+%28pi%2F9%29%2Bcos%5E2+%282pi%2F9%29%2Bcos%5E2%283pi%2F9%29%2Bcos%5E2%284pi%2F9%29+\"$ . \n" ); document.write( "

Algebra.Com's Answer #725413 by ikleyn(52884) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "Replace each sin^2 by the corresponding  1 - cos^2.\r\n" );
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document.write( "After that completing the assignment is pure mechanical work.\r\n" );
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