" If "tan(x+2x^(@))=cos(3x-78)" then "x=

If sin(x+28^(@))=cos(3x-78^(@)) then x=

If x is an acute angle and sin (x + 28^(@))=cos (3x - 78^(@)) , then x =

If x lt 90^(@) and sin(x + 28^(@)) = cos(3x - 78^(@)) , then find x

Differentiate the following with respect to x. (i) sin 2x (ii) cos 3x (iii) tan 4x (iv) sin^3x (v) x^2//tan x

(3)/(tan x)-2 cos x

Prove that : (sin x + sin 3x)/(cos x + cos 3x) = tan 2x

Show that tan" "3x" "tan" "2x" "tan" "x" "=" "tan 3x - tan 2x - tan x .

underset(x to 0)"Lt" ((1-cos 2x)(3+cos x))/(x tan 4x )) is equal to