document.write( "Question 566972: if tanθ = -3/4 90°<θ<180°, find cosθ \n" ); document.write( "

Algebra.Com's Answer #366404 by lwsshak3(11628) $\"\"$ $\"About$

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if tanθ = -3/4 90°<θ<180°, find cosθ
\n" ); document.write( "you are working with a reference angle in quadrant II where tanθ-3/4
\n" ); document.write( "hypotenuse of right triangle=√(3^2+4^2)=√(9+16)=√25=5
\n" ); document.write( "cosθ=-4/5 \n" ); document.write( "

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