[" 7."4ft" sin "A=1/sqrt(5),cos B=3/sqrt(10)" sitt "A,B],[" &TICHG "747ch/v" ; ".71(A+B)vec b" .Fret "c/m" ? "],[[" (a) "pi/6," (b) "pi/4," (c) "pi/3," (d) "pi/2]]

sin(A+B)=1/sqrt(2) cos(A-B)=sqrt3|2

If sin A = 1/ sqrt(5) , cos B = 3/ sqrt(10) , A, B being positive acute angles, then what is (A + B) equal to ?

Sin (A + B) = 1/(sqrt2) Cos(A - B) = (sqrt3)/2

If sin A=1//sqrt(10), sin B= 1//sqrt(5) where A and B are positive and acute , then A +B=

0

0

If sin A + sin B = sqrt (3) (cos B-cos A) then sin3A + sin3B =

If sin A + sin B = sqrt (3) (cos B-cos A) then sin3A + sin3B =

If sin A=(2)/(sqrt(5)) and cos B=(1)/(sqrt(10)), where A and B are acute angles,then what is the value of A+B

If vec a , vec b ,a n d vec c are such that [ vec a vec b vec c]=1, vec c=lambda vec axx vec b , angle, between vec aa n d vec b is (2pi)/3,| vec a|=sqrt(2),| vec b|=sqrt(3)a n d| vec c|=1/(sqrt(3)) , then the angel between vec aa n d vec b is a. pi/6 b. pi/4 c. pi/3 d. pi/2