" (C) "cos3x

Which of the following functions are strictly decreasing on [0,pi/2] (A) cos x (B) cos 2x (C) cos 3x (D) t a n x

Arrange the periods of the following functions in ascending order (A) tan (2x-7) (B) sin x cos x (C) sin 3x+ cos 3x (D) sin^(3)x-cos^(3)x

IfI_(m , n)=intcos^m xsinn xdx , then 7I_(4,3)-4I_(3,2)" is equal to" (a) constant (b) -cos^2x+C (c) -cos^4xcos3x+C (d) cos7x-cos4x+C

IfI_(m , n)=intcos^m xsinn xdx , then 7I_(4,3)-4I_(3,2)" is equal to" (a) constant (b) -cos^2x+C (c) -cos^4xcos3x+C (d) cos7x-cos4x+C

IfI_(m , n)=intcos^m xsinn xdx , then 7I_(4,3)-4I_(3,2)" is equal to" (a) constant (b) -cos^2x+C (c) -cos^4xcos3x+C (d) cos7x-cos4x+C

IfI_(m,n)=int cos^(m)x sin nxdx, then 7I_(4,3)-4I_(3,2) i se q u a lto (a)constant (b)-cos^(2)x+C-cos^(4)x cos3x+C(d)cos7x-cos4x+C

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+ cos 2x+ cos4x + cos 6x= ............. A) 2 cos x cos 2x cos 3x B) 4 sin x cos 2x cos 3x C) 4 cos x cos 2x cos 3x D) 2 sin x cos 2x cos 3x

If int e^(x) .(2sin3x + 5 cos 3x ) dx = (e^(x))/(a) [ b sin 3x + c cos 3x ] + K then (a, b ,c ) =

Prove that cos x+^(n)C_(1)cos2x+^(n)C_(2)cos3x+....+^(n)C_(n)cos(n+1)x=2^(n)*(cos^(n)x)/(2)*cos((n+2)/(2))x