Find the principle solution of `cot x=-sqrt 3`.

Find the principle solution of cos x=-2 .

Find the principal value of cot^-1(-sqrt3)

Find principal solutions: cottheta=-sqrt3

Find principal solutions: sin3theta=-1/sqrt2

Find the principal value of : cot^-1frac{1}{sqrt3}

Find the principal value of : cot^-1 cot(-pi/3)

Find the general solution of the trigonometric equation sqrt(3) sec 2theta=2

Find the derivatives of: sqrt(1+cot x)

Test which of the following is solutions of 6x^2-sqrt2x-2=0 i) -sqrt2/3 ,ii) -sqrt2 ,iii) 1/sqrt2 ,iv) sqrt(2/3)

Find the principal value of the following: cot^-1(sqrt(3))