I'm very sad coz I'm bor. ed I'm crying I want a friend to talk​

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me