" 21."sqrt(2)cos^(2)7x-cos7x=0

The number of solutions of sqrt(6-cos x+7sin^(2)x)+cos x=0

If x in(0,(pi)/(2)), thenshowthat(d)/(dx)cos^(-1){(7)/(2)(1+cos2x)+(sqrt(sin^(2)x-48cos^(2)x))sin x}=1+(7sin x)/(sqrt(sin^(2)-48cos^(2)x))

Solve the equation 2cos^2x-7cos x+3=0 .

Solve the equations: 2 cos^(2)x - 7 cos x + 3 = 0

int(sin^(2)6x-cos^(2)7x)dx=

If x in (0, (pi)/(2)) , then show that cos^(-1) ((7)/(2) (1 + cos 2 x) + sqrt((sin^(2) x - 48 cos^(2) x)) sin x) = x - cos^(-1) (7 cos x)

If x in (0, (pi)/(2)) , then show that cos^(-1) ((7)/(2) (1 + cos 2 x) + sqrt((sin^(2) x - 48 cos^(2) x)) sin x) = x - cos^(-1) (7 cos x)

If x in(0,(pi)/(2)), then show that cos^(-1)((7)/(2)(1+cos2x)+sqrt((sin^(2)x-48cos^(2)x))sin x)=x-cos^(-1)(7cos x)

If x in (0,pi/2), then show that cos^(-1)(7/2(1+cos2x)+sqrt((sin^2x-48cos^2x))sinx)=x-cos^(-1)(7cosx)