Question

Express tan 3598 degree and cot -1952 degree a angles less than 45 degree

Answer 1

Step-by-step explanation:

No matter in which quadrant θ falls, both θ and −θ have the same corresponding acute angle.  What is more, both fall in the same left-or-right half of the x-y plane.  The sign of the cosine depends only on which half. Therefore, cos (−θ) and cos θ will have the same sign:

cos (−θ) = cos θ.

On the other hand, θ and −θ fall in opposite top-or-bottom halves of the plane.  The sign of the sine depends on which of those halves. Therefore, sin (−θ) and sin θ will have opposite signs:

sin (−θ) = −sin θ.