If `cot(alpha+beta)=0\ t h e n\ "sin"(alpha+2beta)` is equal to a. `sinalpha` b. `cos2beta` c. `cosalpha` d. `sin2alpha`

If cot (alpha + beta) = 0 , then sin (alpha + 2 beta) is equal to

If cot (alpha + beta) = 0 , then sin (alpha + 2 beta) is equal to

IF cot ( alpha + beta ) =0 then sin ( alpha + 2 beta ) is equal to

If cot(alpha+beta)=0, then sin(alpha+2 beta) is equal to

If cot(alpha+beta)=0 then sin(alpha+2 beta) is equal to a.sin alpha b.cos2 beta c.cos alpha d.sin2 alpha

If "cot"(alpha+beta)=0, then "sin"(alpha+2beta) can be (a) -sinalpha (b) sinbeta (c) cosalpha (d) cosbeta

If "cot"(alpha+beta)=0, then "sin"(alpha+2beta) can be (a) -sinalpha (b) sinbeta (c) cosalpha (d) cosbeta

If cot(alpha+beta)=0, then sin(alpha+2 beta) can be (a)-sin alpha(b)sin beta(c)cos alpha(d)cos beta

If cos (alpha+beta)=0 , then sin(alpha-beta) canbe reduced to : (a) cosbeta (b) cos2beta ( c) sinalpha (d) sin2alpha

If cosalpha+cosbeta=0=sinalpha+sinbeta,cos2alpha+cos2beta is equal to a) -2sin(alpha+beta) b) 2cos(alpha+beta) c) 2sin(alpha-beta) d) -2cos(alpha+beta)