If `cos (theta +phi)=m cos(theta-phi)`,then the value of `(1-m)/(1+m)cot phi`.

If "sin"(theta+phi)=n"sin"(theta-phi),n ne1 , then the value of ("tan"theta)/("tan"phi) is a) n/(n-1) b) (n+1)/(n-1) c) n/(1-n) d) (n-1)/(n+1)

If (-pi)/(2) lt theta lt (pi)/(2) and theta ne +- (pi)/(4) , then the value of cot((pi)/(4) + theta)cot((pi)/(4)-theta) is

If sin theta- cos theta =1 , then the vlaue of sin^(3) theta- cos^(3) theta is equal to

If cosec theta + cot theta= 5 then the value of tan theta is equal to

if cos theta_(1) + cos theta_(2) + cos theta_(3)= sin theta_(1) + sin theta_(2) + sin theta_(3)= 0 , then the value of cos (theta_(1) + theta_(2)) + cos (theta_(2) + theta_(3)) + cos (theta_(3) + theta_(1)) is

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