document.write( "Question 938151: In which intervals between 0 and 2pi are the sine, cosine and tangents functions all negative? \n" ); document.write( "

Algebra.Com's Answer #571485 by lwsshak3(11628) $\"\"$ $\"About$

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In which intervals between 0 and 2pi are the sine, cosine and tangents functions all negative?
\n" ); document.write( "In quadrant I, all 3 functions >0
\n" ); document.write( "In quadrant II, sin>0, cos<0, tan<0
\n" ); document.write( "In quadrant III, sin<0, cos<0, tan>0
\n" ); document.write( "In quadrant IV, sin<0, cos>0, tan<0
\n" ); document.write( "note:
\n" ); document.write( "Top half of unit circle, sin>0
\n" ); document.write( "Bottom half, sin<0
\n" ); document.write( "Right half of unit circle, cos>0
\n" ); document.write( "Left half, cos<0
\n" ); document.write( "When sin and cos have the same sign, tan>0
\n" ); document.write( "When sin and cos have opposite signs, tan<0
\n" ); document.write( "All 3 functions are never all negative in any of the quadrants \n" ); document.write( "

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