Learn how to solve problems step by step online. Solve the trigonometric equation sin(x)^2-3cos(x)=0. Applying the trigonometric identity: \sin\left(\theta \right)^2 = 1-\cos\left(\theta \right)^2. We can try to factor the expression 1-\cos\left(x\right)^2-3\cos\left(x\right) by applying the following substitution. Substituting in the polynomial, the expression results in. Use the complete the square method to factor the trinomial of the form ax^2+bx+c. Take common factor a (-1) to all terms.

Solve the trigonometric equation sin(x)^2-3cos(x)=0