If `cos(alpha-beta)=3sin(alpha+beta),t h e n1/(1-3sin2alpha)+1/(1-3sin2beta)=` (a)`1/2` (b) `(-1)/2` (c) `1/4` (d) `(-1)/4`

If cos(alpha-beta)=3sin(alpha+beta),t h e n 1/(1-3sin2alpha)+1/(1-3sin2beta)= (a) 1/2 (b) (-1)/2 (c) 1/4 (d) (-1)/4

If cos(alpha-beta)=3sin(alpha+beta),t h e n 1/(1-3sin2alpha)+1/(1-3sin2beta)= (a) 1/2 (b) (-1)/2 (c) 1/4 (d) (-1)/4

If cos(alpha-beta)=3sin(alpha+beta),t h e n1/(1-3sin2alpha)+1/(1-3sin2beta)= 1/2 (b) (-1)/2 (c) 1/4 (d) (-1)/4

If cos(alpha-beta)=3sin(alpha+beta), then (1)/(1-3sin2 alpha)+(1)/(1-3sin2 beta)= (a) (1)/(2) (b) (-1)/(2) (c) (1)/(4) (d) (-1)/(4)

If p sin (alpha+beta) = cos (alpha -beta) , show that 1/(1-p sin 2alpha)+1/(1-p sin2beta)=2/(1-P^2)

If m sin (alpha-beta) = cos (alpha-beta) , prove that (1)/(1- m sin 2 alpha)+(1)/(1-m sin 2 beta)=(2)/(1-m^(2)) .

If m sin (alpha+beta) = cos (alpha-beta) , prove that (1)/(1- m sin 2 alpha)+(1)/(1-m sin 2 beta)=(2)/(1-m^(2)) .

If p sin (alpha+ beta)= cos (alpha-beta) , then show that (1)/(1- p sin2 alpha)+(1)/(1-p sin 2 beta)=(2)/(1-p^(2)) .

If m sin (alpha+beta) = cos (alpha-beta) , prove that (1)/(1- m sin 2 alpha)+(1)/(1-m sin 2 beta)=(2)/(1-m^(2)) .

If sin(alpha+beta)=1,sin(alpha-beta)=(1)/(2) then tan(alpha+2 beta)tan(2 alpha+beta)=