document.write( "Question 795495: It a general solution: 3cos squard x-1=5sinx \n" ); document.write( "
Algebra.Com's Answer #481048 by Cromlix(4381)\"\" \"About 
You can put this solution on YOUR website!
3cos^2x - 1 = 5sinx
\n" ); document.write( "Convert cos^2x = 1 - sin^2x
\n" ); document.write( "3(1 - sin^2x) - 1 = 5sinx
\n" ); document.write( "3 - 3sin^2x - 1 = 5cosx
\n" ); document.write( "2 - 5sinx - 3sin^2x = 0
\n" ); document.write( "(2 + sinx)(1 - 3sinx) = 0
\n" ); document.write( "2 + sinx = 0
\n" ); document.write( "sinx = -2 (no answer)
\n" ); document.write( "1 - 3sinx = 0
\n" ); document.write( "sinx = 1/3
\n" ); document.write( "x = 19.5 degrees,160.5 degrees
\n" ); document.write( "x = 0.34 radians, 2.8 radians.
\n" ); document.write( "Hope this helps.
\n" ); document.write( ":-)
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