document.write( "Question 1188000: c. use the reference angle and appropriate sign to find the exact value of each expression.show solution. 1.csc 510degrees 2.cot(-225degrees) 3.sec120degrees 4.cos 13pi symbol/3 5.tan(-10 pi symbol/3) 6.sin 5 pi symbol/4 thank u so much... \n" ); document.write( "
Algebra.Com's Answer #819033 by Alan3354(69443)\"\" \"About 
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use the reference angle and appropriate sign to find the exact value of each expression. show solution.
\n" ); document.write( "1.csc 510degrees
\n" ); document.write( "=csc(150) = 1/sin(150) = 1/sin(30) = 1/(1/2) = 2
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\n" ); document.write( "2.cot(-225degrees)
\n" ); document.write( "Step 1, add or subtract 360 degs to find a positive angle between 0 and 360 (0 and 2pi in radians).
\n" ); document.write( "----
\n" ); document.write( "cot(-225degrees) = cot(135)
\n" ); document.write( "= 1/tan(135)
\n" ); document.write( "--------
\n" ); document.write( "3.sec120degrees
\n" ); document.write( "= 1/cos(120)
\n" ); document.write( "-----------
\n" ); document.write( "4.cos 13pi/3 - 2pi = 7pi/3
\n" ); document.write( "7pi/3 - 2pi = pi/3
\n" ); document.write( "cos(pi/3) = cos(60) degs = 1/2
\n" ); document.write( "-----------
\n" ); document.write( "5.tan(-10pi/3)
\n" ); document.write( "Add 4pi
\n" ); document.write( "= tan(2pi/3) = tan(120) degs
\n" ); document.write( "----------------
\n" ); document.write( "6.sin(5pi) = sin(pi) = sin(180) = 0
\n" ); document.write( "thank u so much...
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