If tan theta = 10/13 and cos theta > 0 then sin2theta is what ?

Polynomial that can be factored as (3x-4)(3x+4)

Someone me! if you’re smart you can solve this!

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.