document.write( "Question 1042536: If sin θ = 2 over 7 and tan θ > 0, what is the value of cos θ? \r
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Algebra.Com's Answer #657523 by Fombitz(32388)\"\" \"About 
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Use,
\n" ); document.write( "\"cos%5E2%28theta%29%2Bsin%5E2%28theta%29=1\"
\n" ); document.write( "\"cos%5E2%28theta%29%2B%282%2F7%29%5E2=1\"
\n" ); document.write( "\"cos%5E2%28theta%29=1-4%2F49\"
\n" ); document.write( "\"cos%5E2%28theta%29=45%2F49\"
\n" ); document.write( "\"cos%28theta%29=0+%2B-+%283%2F7%29sqrt%285%29\"
\n" ); document.write( "Since you know that \"tan%28theta%29=sin%28theta%29%2Fcos%28theta%29%3E0\" and \"sin%28theta%29%3E0\", then \"cos%28theta%29%3E0\"
\n" ); document.write( "So,
\n" ); document.write( "\"cos%28theta%29=%283%2F7%29sqrt%285%29\"
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