`(lim)_(theta->pi//2)(1-s intheta)/((pi//2-theta)costheta)` is equal to a. 1 b . -1 c. 1/2 d. -1/2

(lim)_(theta->pi//2)(1-sintheta)/((pi//2-theta)costheta) is equal to a. 1 b. -1 c. -1/2 d. 1/2

(lim)_(theta rarr pi/2)(1-s int h eta)/((pi/2-theta)cos theta) is equal to a.1 b.-1 c.1/2 d.-1/2

lim_(theta rarr pi/2) (1-sin theta )/((pi/2 - theta) cos theta)=

lim_(x rarr(pi)/(2))(1-sin theta)/(((pi)/(2)-theta)cos theta)=

int(1-costheta)^2 d theta is equal to

If costheta_1 =2costheta_2, then tan((theta_1-theta_2)/2)tan((theta_1+theta_2)/2) is equal to (a) 1/3 (b) -1/3 (c) 1 (d) -1

If costheta_1 =2costheta_2, then tan((theta_1-theta_2)/2)tan((theta_1+theta_2)/2) is equal to (a) 1/3 (b) -1/3 (c) 1 (d) -1

If (pi)/(2)