<span>you have to create variables that have the same coefficient</span>
Answer:
The most straightforward way to obtain the expression for cos(2x) is by using the "cosine of the sum" formula: cos(x + y) = cosx*cosy - sinx*siny. cos(2x) = cos² (x) - (1 - cos²(x)) = 2cos²(x) - 1. = 2cos²(x) - 1.
Step-by-step explanation:
28 m because it is the smallest number
2/3, 4/5, 1/8 is the correct order from greatest to least.
