For all, `x in [0,pi/2]`, the minimum value of `cos(cosx)`
a) 0
b) `cos1`
c) `-cos1`
d) 1

If A,B,C are the angles of triangle ABC, then the minimum value of |{:(-2,cos C , cos B),(cos C , -1, cos A ) , (cos B , cos A , -1):}| is equal to :

If A,B,C are the angles of triangle ABC, then the minimum value of |{:(-2,cos C , cos B),(cos C , -1, cos A ) , (cos B , cos A , -1):}| is equal to :

If alpha+beta=90^(0) ,then the minimum and maximum values of cos alpha*cos beta are (A) -1/3 and 1/3 (B) -1 and 1 (C) -1/4 and 1/4 (D) -1/2 and 1/2

If 0ltxlt(pi)/(2) then the minimum value of (cos^(3)x)/(sinx)+(sin^(3))/(cosx)(x)/(x) , is

If y=cos x ,then what is the maximum value of y (A) 1 (B) -1 (C) pi (D) 2 pi

The value of cos1^(0)cos2^(0)cos3^(0)cos179^(@) is 1/sqrt(2) b.0 c.1 d.-1

If sin A+sin^(2)A=1, then the value of cos^(2)A+cos^(4)A is 2(b)1(c)-2(d)0

The value of cos52^(0)+cos68^(0)+cos172^(0) is 0 b.1 c.2 d.3/2

Find the maximum and minimum value of f(x)=sin x+(1)/(2)cos2x in [0,(pi)/(2)]

Find the maximum and minimum values of f(x)=sin x+(1)/(2)cos2x in [0,pi/2]