sin(1)/(4)(b+x)+cos(1)/(4)(b-x)

(d)/(dx)(cos (x/2))= (A) (1)/(2)sin(x)/(2) , (B) -(1)/(2)cos(x)/(2) (C) -(1)/(2)sin(x)/(2) , (D) -sin(x)/(4)

lim_(x rarr1)(a sin(x-1)+b cos(x-1)+4)/(x^(2)-1)=-2, then |a+b|

If sin^(3)x cos3x+cos^(3)x sin3x=(3)/(8), then the value of sin4x is (1)/(2)(b)1(c)-(1)/(2)(d)0

(1)/(sin^(4x)+cos^(4)x)

sin ^ (4) x = 1-cos ^ (4) x

Let cos^(-1)(4x^(3)-3x)=a+b cos^(-1)x Q. If x in [-(1)/(2), (1)/(2)] , then sin^(-1)("sin"(a)/(b)) is :

Let cos^(-1)(4x^(3)-3x)=a+b cos^(-1)x Q. If x in [-(1)/(2), (1)/(2)] , then sin^(-1)("sin"(a)/(b)) is :

If (cos^(4)A)/(cos^(2)B)+(sin^(4)A)/(sin^(2)B)=1 then prove that (i)sin^(2)A+sin^(2)B=2sin^(2)A sin^(2)B(ii)(cos^(4)B)/(cos^(2)A)+(sin^(4)B)/(sin^(2)A)=1

sqrt(2)cos A=cos B+cos^(3)B, and sqrt(2)sin A=sin B-sin^(3)B then sin(A-B)+-1(b)+-(1)/(2)(c)+-(1)/(3)(d)+-(1)/(4)