wats d value of Tan70 -2Cot 40 =Tanx         2 maro ish d exjam

 

     2          2           2          2         2         2            

Sin 12 +Sin 21 +Sin 39 +Sin 48 -Sin 9 - Sin 18

 

If 3 vectors a,b,c such dat a 0  & axb = 2(axc) , IaI =IcI=1 , IbI =4 & d angle btw b ,c is cos^-1 [1/4] , den b-2c =lambda (a)

 

[a b c ] =3 den [2axb +2bxc +cxa] . [2axb - bxc - 2cxa]x[axb -2bxc +2cxa] =?

 

let a,b,c b non 0 vectors such dat (axb)xc =1/3 IbI IcI a .if teta is d acute angl btw d vectors b & c , den Sin[teta] =?

 

If d area of a triangl is 5s.u ; den d area of d triangl when d origin is shifted 2

(2,-1) is ?