" i) "4cos^(2)x=1

Find general solution of 4cos^(2)x=1

If "sin" x + "sin"^(2) x = 1 show that: cos^(4)x + cos^(2)x = 1 (ii) If "sin" x + cos x =sqrt(2) cos x show that: sqrt2 sin x = cos x - sin x

If 4cos^(2)x(@)-1=0 and 0 le x^(@) le 90^(@) , find : 1/(cos^(2)x^(@))-tan^(2)x^(@)

If 4cos^(2)x^(@)-1=0 and 0 le x^(@) le 90^(@) , find : 1/(cos^(2)x^(@))-tan^(2)x^(@)

Number of solutions of the equation (1+x^(2))cos ecx-4cos^(2)x+1=0 if x in[-2 pi,2 pi], is

If 4cos^(2)x^(@)-1=0 and 0 le x^(@) le 90^(@) , find : sin^(2)x^(@)+cos^(2)x^(@)

If 4cos^(2)x(@)-1=0 and 0 le x^(@) le 90^(@) , find : sin^(2)x^(@)+cos^(2)x^(@)

the value of lim_(x rarr pi)(1)/(x-pi)(((4cos^(2)x)/(2+cos x))^((1)/(2))-2) is

If 4cos^(2)x-2(1+sqrt(3))cosx+sqrt(3)=0 the solution set in [0,pi] is