Elements of plane and spherical trigonometry . , and esc negative,and tan and cot positive. In the fourth quadrant x is positive and y is negative.Hence in this quadrant the negative
![What is the value of \\[\\cos 180{}^\\circ \\]?](https://www.vedantu.com/question-sets/e1b56110-7c40-4a64-8c43-c07c8d64260977845369144153752.png "What is the value of \\[\\cos 180{}^\\circ \\]?")
What is the value of \\[\\cos 180{}^\\circ \\]?
the value of theta for which sin theta = cos theta nbsp; where , 180 lt;theta lt;360
![For all theta in [ 0, pi/2 ] Prove that cos (sintheta)> sin (costheta)](https://dwes9vv9u0550.cloudfront.net/images/5437567/021fdb43-609f-4d49-b9b1-63a04c76a0cb.jpg "For all theta in [ 0, pi/2 ] Prove that cos (sintheta)> sin (costheta)")
For all theta in [ 0, pi/2 ] Prove that cos (sintheta)> sin (costheta)
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d)/(dx)cos x^(0)= (A)-sin x^(0) (B)-(pi)/(180)sin x^(0) ( C) (pi)/(180)sin x^(0) (D) (2 pi)/(180)sin x^(0)
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![clear x=[0:360]; yl=sin(x*pi/180); y2=cos (x*pi/180); | Chegg.com](https://media.cheggcdn.com/study/37e/37eac70a-7775-41dd-8df9-b2a001e6f18a/image.png "clear x=[0:360]; yl=sin(x*pi/180); y2=cos (x*pi/180); | Chegg.com")
clear x=[0:360]; yl=sin(x*pi/180); y2=cos (x*pi/180); | Chegg.com
