document.write( "Question 906371: if cos x = squareroot of 2 over 2 in which quadrants could angle x terminate only one 2 has the square root \n" ); document.write( "
Algebra.Com's Answer #549756 by stanbon(75887)\"\" \"About 
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if cos x = squareroot of 2 over 2 in which quadrants could angle x terminate only one 2 has the square root
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\n" ); document.write( "Note: sqrt(2)/2 is a positive number.
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\n" ); document.write( "By devinition, cosine = x/r
\n" ); document.write( "r is always positive because r = sqrt(x^2+y^2)
\n" ); document.write( "So cos is positive when x is positive.
\n" ); document.write( "x is positive in QI and in QIV
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\n" ); document.write( "Ans: the angle must terminate in QI or in QIV.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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