if `a=cos 2 and b =sin7,` then

If a=cos2 and b=sin7, then

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

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 (cos(a+d))/(cos(b+c)) is

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 cos(A+B+C)=cos A cos B cos C , then (8sin(B+C)sin(C+A)sin(A+B))/(sin2A sin 2B sin 2C)=

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

If sqrt(2)cos A = cos B + cos^(3)B , and sqrt(2)sin A = sin B- sin^(3)B then sin(A-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 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)

If A+B+C=pi/2 prove the following (i) sin 2A+sin 2B +sin 2C=4 cos A cos B cos C (ii) cos 2A +cos 2B+cos 2C=1+4 sin A sin B sin C.