If `sin^4 A/a+cos^4 A/b=1/(a+b)`, then the value of `sin^8 A/a^3+cos^8 A/b^3` is equal to (A) `1/(a+b)^3` (B) `(a^3b^3)/(a+b)^3` (C) `(a^2b^2)/(a+b)^2` (D) none of these

If (sin^(4)A)/(a)+(cos^(4)A)/(b)=(1)/(a+b), then the value of (sin^(8)A)/(a^(3))+(cos^(8)A)/(b^(3)) is equal to (A) (1)/((a+b)^(3)) (B) (a^(3)b^(3))/((a+b)^(3))(C)(a^(2)b^(2))/((a+b)^(2)) (D) none of these

If sin (3A-B) = 1 and cos (2A - B) = (sqrt(3))/(2) , then the value of sin A and cos B are .

If sin^4alpha/a+cos^4alpha/b=1/(a+b) show that sin^8alpha/a^3+cos^8alpha/b^3=1/((a+b)^3)

If sin^4alpha/a+cos^4alpha/b=1/(a+b) ,then show that sin^8alpha/a^3+cos^8alpha/b^3=1/((a+b)^3) .

If A + B=90^(@) and cos B=1//3 , then the value of sin A is A. 1/2 B. 1/4 C. 1/3 D. 2/3

If sin B = (1)/(2), then 3 cos B - 4 cos ^(3)B is equal to (a) 1 (b) 3/4 (c) 0 (d) 2 (1)/(2)

If (sin^(4)alpha)/a +(cos^(4)alpha)/b = 1/(a+b) , show that sin^(8)alpha/a^(3) +cos^(8)alpha/b^(3) =1/(a+b)^(3)

If (sin^(4)phi)/(a)+(cos^(4)phi)/(b)=(1)/(a+b) then prove that (sin^(8)phi)/(a^(3))+(cos^(8)phi)/(b^(3))=((1)/(a+b))^(3)