document.write( "Question 923529: Determine all solutions of the equation in radians
\n" ); document.write( "find cosx/2, given that sec x = 4 and x terminates in 0\n" ); document.write( "\n" ); document.write( "I tried and got +- sqr(5/8) but i don't how to make it to radian.
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Algebra.Com's Answer #560105 by lwsshak3(11628)\"\" \"About 
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Determine all solutions of the equation in radians
\n" ); document.write( "find cosx/2, given that sec x = 4 and x terminates in 0\n" ); document.write( "***
\n" ); document.write( "cosx=1/secx=1/4 (In quadrant I where cos>0)
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\n" ); document.write( "cos(x/2)=√(5/8)
\n" ); document.write( "use inverse cos key on calculator set to radians,then punch in √(5/8)
\n" ); document.write( "cos(x/2)≈0.659 radians
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