# Math Help - Equation help

1. ## Equation help

Hey I just need help figuring these out.

1.Solve the following equation in the interval [0, 2pi].

2. Solve the equation

2. Originally Posted by badandy328
Hey I just need help figuring these out.

1.Solve the following equation in the interval [0, 2pi].

2. Solve the equation
For the first, let x = cos(t). Solve the quadratic for x, then take the inverse cosine.

For the second, multiply both sides of the equation by (x + 1)(x - 2).

-Dan

3. 1) On the first, would you consider factoring or the quadratic formula if it said $2x^{2} - x - 1 = 0$?

2) Say $x \neq -1$ and $x \neq -2$ and add the fractions and solve.