document.write( "Question 827144: Can someone please help me find the exact value of trig functions? (no calculator) I'm very lost, so a detailed explanation would be much appreciated. thank you so much
\n" ); document.write( "1) cos33pie/4
\n" ); document.write( "2)tan(21pie)
\n" ); document.write( "3)sec 17pie/4 \n" ); document.write( "

Algebra.Com's Answer #498490 by lwsshak3(11628) $\"\"$ $\"About$

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1) cos33pie/4
\n" ); document.write( "33π/4=8π+π/4
\n" ); document.write( "This is revolving 4 revolutions counter-clockwise around a unit circle plus an additional π/4 which places the reference angle in quadrant I in which cos>0.
\n" ); document.write( "cos33pie/4=cos(π/4)=√2/2
\n" ); document.write( "..
\n" ); document.write( "2)tan(21pie)
\n" ); document.write( "21π=20π+π
\n" ); document.write( "This is revolving 10 revolutions counter-clockwise around a unit circle plus an additional π.
\n" ); document.write( "tan(21pie)=tan(π)=0
\n" ); document.write( "..
\n" ); document.write( "3)sec 17pie/4
\n" ); document.write( "17π/4=4π+π/4
\n" ); document.write( "This is revolving 2 revolutions counter-clockwise around a unit circle plus an additional π/4 which places the reference angle in quadrant I in which sec>0.
\n" ); document.write( "sec 17pie/4=sec(π/4)=√2 \n" ); document.write( "

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