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)![]() ![]() You can put this solution on YOUR website! 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 \n" ); document.write( "================ \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... \n" ); document.write( " |