If `a = cos 2` and `b = sin 7,` then

if a=cos 2 and b =sin7, then

If sin A=a cos B and cos A=b sin B then tan^(2)B =

If A = 60 ^(@) and B = 30 ^(@) , find the value of (sin A cos B+ cos A sin B)^(2) + (cos A cos B - sin A sin B )^(2)

cos A = a cos B, sin A = b sin B rArr (b ^ (2) -a ^ (2)) sin ^ (2) B =

If sqrt2 cos A = cos B + cos^(3) B "and" sqrt2 sin A = sin B - sin^(3) B, "then the value of" sin (A - B) "will be"

If : A+B+C=pi, "then"" "sin ^(2) A +sin^(2)B - sin ^(2)C= A) 2 cos A * cos B * sin C B) 2 cos B * cos C * sin A C) 2 sin A * sin B * cos C D) 2 sin B * sin C * cos A

If cos(A+B+C)=cos A cos B cos C, then find the value of (8sin(B+C)sin(C+A)sin(A+B))/(sin2A sin2sin2C)

Let 0<=a,b,c,d<=pi, where b and c are not complementary,such that 2cos a+6cos b+7cos c+9cos d=0 and 2sin a-6sin b+7sin c-9sin d=0, then 2sin a-6sin b+7sin c-9sin d=0, then the value of 3(cos(a+d))/(cos(b+c)) is

If sin a+7sin b=4(sin c+2sin d) and cos a+7cos b=4(cos c+2cos d) ,where a,b,c,d in[0,pi], then the value of (cos(a-d))/(cos(b-c)) is (A) (7)/(2) (B) (2)/(7) (C) (7)/(4) (D) (4)/(7)