document.write( "Question 173031This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B
\n" ); document.write( ": 3) the expression \r
\n" ); document.write( "\n" ); document.write( "sin^2 x + cos^2 x / cos x\r
\n" ); document.write( "\n" ); document.write( "is equivalent to
\n" ); document.write( " 1) sin x 2) cos x 3) sec x 4) csc x\r
\n" ); document.write( "\n" ); document.write( "4) if the probability that an event will occus is x/y , what is the probability that it will not occur?
\n" ); document.write( " 1) y/x 2) -x/y 3) y - x / y 4) 1 - x / y\r
\n" ); document.write( "\n" ); document.write( "Please show work, thank you!\r
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Algebra.Com's Answer #127891 by Alan3354(69443)\"\" \"About 
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3) the expression
\n" ); document.write( "sin^2 x + cos^2 x / cos x
\n" ); document.write( "is equivalent to
\n" ); document.write( "1) sin x 2) cos x 3) sec x 4) csc x
\n" ); document.write( "sin^2 + cos^2 = 1 (a basic identity. Do you need proof of it?)
\n" ); document.write( "sin^2 x + cos^2 x / cos x = 1/cos = secant(x)
\n" ); document.write( "3) sec(x)
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\n" ); document.write( "4) if the probability that an event will occus is x/y , what is the probability that it will not occur?
\n" ); document.write( "1) y/x 2) -x/y 3) y - x / y 4) 1 - x / y
\n" ); document.write( "All probabilities total 100%, or 1.
\n" ); document.write( "So the probability it will not occur = 1 - x/y
\n" ); document.write( "4) 1 - (x/y)
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