Express cotangent of x in terms of sin x

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

If value of cos330° is √3/2 then find tan165°.