document.write( "Question 882824: If $\"sin+A=4%2F5\"$ and A is in the first quadrant, find $\"cos%28A%2F2%29\"$ and $\"tan%28A%2F2%29\"$ \n" ); document.write( "

Algebra.Com's Answer #533115 by lwsshak3(11628) $\"\"$ $\"About$

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If $\"sin+A=4%2F5\"$ and A is in the first quadrant, find $\"cos%28A%2F2%29\"$ and $\"tan%28A%2F2%29\"$
\n" ); document.write( "sinA=4/5
\n" ); document.write( "cosA=3/5
\n" ); document.write( "..
\n" ); document.write( "cos(A/2)=

\n" ); document.write( "sin(A/2)=

\n" ); document.write( "tan(A/2)=sin(A/2)/cos(A/2)=√(1/4)=1/2 \n" ); document.write( "

\n" );