document.write( "Question 741216: if 7 sin square A + 3 cos square A=4 , find the value of sec A + cosec A \n" ); document.write( "

Algebra.Com's Answer #451894 by lwsshak3(11628) $\"\"$ $\"About$

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if 7 sin square A + 3 cos square A=4 , find the value of sec A + cosec A
\n" ); document.write( "***
\n" ); document.write( " $\"7sin%5E2%28A%29%2B3cos%5E2%28A%29=4\"$
\n" ); document.write( " $\"7%281-cos%5E2%28A%29%29%2B3cos%5E2%28A%29=4\"$
\n" ); document.write( " $\"7-7cos%5E2%28A%29%2B3cos%5E2%28A%29=4\"$
\n" ); document.write( " $\"-4cos%5E2%28A%29=-3\"$
\n" ); document.write( " $\"cos%5E2%28A%29=3%2F4\"$
\n" ); document.write( "cos(A)=√3/2
\n" ); document.write( "A=30º
\n" ); document.write( "sec(A)=2/√3=2√3/3
\n" ); document.write( "csc(A)=2 \n" ); document.write( "

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