If `A = 130^@` and `x = sin A + cos A` , then `(a) x>0 (b) x<0 (c) x=0`

If sin y=x sin(y+a) and (dy)/(dx)=(A)/(1+x^(2)-2x cos a) ,then the value of A if x=0 and y=0 is (A) 2 (B) cos a (C) sin a (D) sin2a

If x=sin 130^(@) + cos 130^(@) then

If P(x) =[(cos x, -sin x),(sin x , cos x)] , then show that P(A) P(B)=P(A+B) .

If y= tan ^(-1) ((a cos x- b sin x )/(b cos x + a sin x ) ) , then (dy)/(dx) is :

If a sin^(3)x+b cos^(3)x= sin x cos x and a sin x= b cos x then a^(2)+b^(2)=

If sin x+cos x=0 then |sin x-cos x|=

(sin 3x + sin x ) sin x + (cos 3x - cos x) cos x =0

(sin 3x + sin x ) sin x + (cos 3x - cos x) cos x =0