If `a=costheta+isintheta,` then `(1+a)/(1-a) ` is a. `cot(theta/2)` b. `cottheta` c. `icot(theta/2)` d. `itan(theta/2)`

If a=cos theta+i sin theta, then (1+a)/(1-a)=(cot theta)/(2) b.cot theta c.i(cot theta)/(2)d*i(tan theta)/(2)

If z=1/(1-cos theta-i sin theta), then Re(z) is a. 0 b. 1/2 c. cot(theta/2) d. 1/2 cot (theta/2)

The value of (2(sin2theta+2cos^2theta-1))/(costheta-sintheta-cos3theta+sin3theta) is a.\ costheta b. sectheta c. cosectheta d. sintheta

The value of (2(sin2theta+2cos^2theta-1))/(costheta-sintheta-cos3theta+sin3theta) is adot costheta b. sectheta c. cosectheta d. sintheta

Solve: cot\ theta/2-cottheta=cosec\ theta/2

Solve: cot\ theta/2-cottheta=cosec\ theta/2

If z=(1)/(1-cos theta-i sin theta), then Re(z) is a.0 b.(1)/(2) c.cot((theta)/(2)) d.(1)/(2)cot((theta)/(2))

If z= costheta+isintheta , then the value of (z^(2n)-1)/(z^(2n)+1) (A) i tan n theta (B) tan n theta (C) icot n theta (D) -i tan n theta

Prove: (1+costheta-sin^2theta)/(sintheta(1+costheta))= cottheta

If cosec theta - cottheta = (1)/(3) , then cosec theta + cot theta =