document.write( "Question 1133873: if sin A=6÷13 and SecB=13÷6 then A+B is equal to
\n" ); document.write( "150°
\n" ); document.write( "90°
\n" ); document.write( "60°
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Algebra.Com's Answer #751200 by MathLover1(20849)\"\" \"About 
You can put this solution on YOUR website!
\r
\n" ); document.write( "\n" ); document.write( " if \"sin+%28A%29=6%2F13\"=>\"A=sin+%5E-1%286%2F13%29\"=>\"A=27.49\"°\r
\n" ); document.write( "\n" ); document.write( " and if \"sec%28B%29=13%2F6+\"=>\"sec%28B%29=1%2Fcos%28B%29+\"\r
\n" ); document.write( "\n" ); document.write( "=>\"1%2Fcos%28B%29=13%2F6+\"\r
\n" ); document.write( "\n" ); document.write( "=>\"cos%28B%29=1%2F%2813%2F6%29\"
\n" ); document.write( "=>\"cos%28B%29=6%2F13\"
\n" ); document.write( "\"B=cos%5E-1%286%2F13%29\"
\n" ); document.write( "\"B=62.51\"°\r
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\n" ); document.write( "\n" ); document.write( "then \"A%2BB=27.49%2B62.51\"° \r
\n" ); document.write( "\n" ); document.write( "\"A%2BB=90\"° \r
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