Question

Solve this equation: 2cosx+5=4

Answer 1

$\frac{2 \pi }{3}$

Answer 2

Answer:

2pi/3 and 4pi/3

Step-by-step explanation:

Solve for cosine and you will get cosx=-1/2. Using the unit circle find every point where the x value = -1/2 (since cosine is x). You will find that the angles where x = -1/2 are 2pi/3 and 4pi/3