If `sintheta_1sintheta_2-costheta_1costheta_2+1=0,` then the value of `tan((theta_1)/2)cot((theta_2)/2)` is equal to (a)`-1` (b)` 1` (c) `2 `(d) `-2`

(sintheta+sin2theta)/(1+costheta+cos2theta)

costheta -sintheta -cottheta +1=0

The value of sin^(2)theta+(1)/(1+tan^(2)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

Prove that (sintheta +sin2theta)/(1+costheta +cos2theta)=tantheta

If sintheta-costheta=1, then the value of sin^3theta-cos^3theta is __________

(1+tan^(2)theta)/(1+cot^(2)theta)=

If theta_1 and theta_2 are two values lying in [0,2pi] for which t a ntheta=lambda, then tan((theta_1)/2)tan((theta_2)/2) is equal to (a)0 (b) -1 (c) 2 (d) 1

If costheta:sintheta=1:2 , then find the value of (8costheta-2sintheta)/(4costheta+2sintheta)