document.write( "Question 985872: 1)If sinA=sinB and cosA=cosB then A=______.\r
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\n" ); document.write( "\n" ); document.write( "2)If (1+tan x)(1+tan y)=2 then x+y=_____.\r
\n" ); document.write( "\n" ); document.write( "3)If tanx+tan(60°+x)+tan(120°+x)=3 then x=______.\r
\n" ); document.write( "\n" ); document.write( "4)1+ sinx +sin^2x..........=4+2√3,0\n" ); document.write( "\n" ); document.write( "5)The values if x in (-Π,Π) which satisfy the equation 8^(1+|cos x|+|cos^2x|+|cos^3x|+........).\r
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Algebra.Com's Answer #606732 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "1)If sinA=sinB and cosA=cosB then A=B or else they differ by  or \r\n" );
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document.write( "Since the period of sine and cosine is  or 360°, the general solution is \r\n" );
document.write( " or A = B + 360°n, where n is any integer   \r\n" );
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document.write( "2)If \r\n" );
document.write( " then _____.\r\n" );
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document.write( "FOIL out the left side:\r\n" );
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document.write( "If we remember our identities and also notice that we are \r\n" );
document.write( "asked to find x+y, and notice that there are tangents in\r\n" );
document.write( "the problem and then we we think of the identity we \r\n" );
document.write( "have memorized for tan(x+y)\r\n" );
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document.write( "We recognize some of the terms in our equation are like some\r\n" );
document.write( "of the terms in that identity so let's get tan(x)+tan(y) alone\r\n" );
document.write( "on the left side since that's the numerator of the right side\r\n" );
document.write( "of that identity:\r\n" );
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document.write( "Well what do you know! the right side is just the denominator \r\n" );
document.write( "of the right side of that identity: \r\n" );
document.write( "So we divide both sides by the right side:    \r\n" );
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document.write( "The left side is the left side of that identity and the right side is 1. \r\n" );
document.write( "So we have\r\n" );
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document.write( "Since the period of the tangent is  or 180°\r\n" );
document.write( "x+y =  or 45°+180°n, where n is any integer, positive,\r\n" );
document.write( "negative, or zero. \r\n" );
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document.write( "Limit: 2 problems\r\n" );
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document.write( "Edwin

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