document.write( "Question 829909: solve the equation:
\n" ); document.write( "1. 4 sin^-1 (x) = π
\n" ); document.write( "2. 3 cos^-1 (2x) = 2π
\n" ); document.write( "3. 3 tah^-1 x = π
\n" ); document.write( "4. 4 cos^-1 x - 2π = 2 cos^-1 x \n" ); document.write( "
Algebra.Com's Answer #500776 by lwsshak3(11628)\"\" \"About 
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solve the equation:
\n" ); document.write( "1. 4 sin^-1 (x) = π
\n" ); document.write( "sin^-1 (x) = π/4
\n" ); document.write( "x=sin(π/4)=√2/2
\n" ); document.write( "..
\n" ); document.write( "2. 3 cos^-1 (2x) = 2π
\n" ); document.write( "cos^-1 (2x) = 2π/3
\n" ); document.write( "2x=cos(2π/3)
\n" ); document.write( "x=cos(2π/3)/2=(-1/2)/2=-1/4
\n" ); document.write( "..
\n" ); document.write( "3. 3 tan^-1 x = π
\n" ); document.write( "tan^-1(x)=π/3
\n" ); document.write( "x=tan(π/3)=√3
\n" ); document.write( "..
\n" ); document.write( "4. 4 cos^-1 x - 2π = 2 cos^-1 x
\n" ); document.write( "2 cos^-1 (x)=2π
\n" ); document.write( "cos^-1 (x)=π
\n" ); document.write( "x=cosπ=-1 \n" ); document.write( "
\n" );