If `cos(A-B)=3/5a n dt a n At a n B=2,` then `cos Acos B=1/5` (b) `sin A sin B=-2/5` `cos AcosB=-1/5` (d) `sin A sinB=-1/5`

If cos(A-B)=3/5 and tan A tan B=2, then (a) cos A cos B=1/5 (b) sin A sin B=-2/5 (c) cos A cos B=-1/5 (d) sin A sin B=-1/5

If cos(A-B)=3/5 and tan A tan B=2, then (a) cos Acos B=1/5 (b) sin A sin B=-2/5 (c) cos AcosB=-1/5 (d) sin A sinB=-1/5

If cos(A-B)=3/5 and tan A tan B=2, then (a) cos Acos B=1/5 (b) sin A sin B=-2/5 (c) cos AcosB=-1/5 (d) sin A sinB=-1/5

If cos(A-B)=(3)/(5) andtan Atan B=2, then cos A cos B=(1)/(5)(b)sin A sin B=-(2)/(5)cos A cos B=-(1)/(5)(d)sin A sin B=-(1)/(5)

If cos(A-B)=3/5a n d\ t a n AtanB=2, t h e n cos A\ cosB=1/5 b. cosA\ cos B=\ -1/5 c. sin A\ sin B=\ -1/5 d. sin A\ sin B=\ -1/5

If cos(A-B)=3/5 and tanAtanB=2 then......................... A) cos A cos B=1/5 B) sin A sin B = -2/5 C) cos A cos B =-1/5 D) sin A sin B =-1/5

If cos(A-B)=3/5 and tanA tanB=2, then a.cos A cosB=1/5 b. cosA cos B= -1/5 c. sin A sin B= -1/5 d. sin A sin B= -1/5

If cos(A-B)=(3)/(5) and tan A tan B=2,thencos A cos B=(1)/(5) b.cot cos B=-(1)/(5)cs in As in B=-(1)/(5)ds in As in B=-(1)/(5)

If A +B = 90 , prove that (cos A + cos B)/(sin A+ sinB)=1 .

a.cos A + b.cos B + c.cos C = 2a sin B sin C