Psl help no links though will give brainliest to whoever awnsers correct

Provide an example of a trigonometric function and describe how it is transformed from the standard trigonometric function f(x) = sin x, f(x) = cos x, or f(x) tan x using key features.

What kind of bond pays interest which is exempt from tax?

What are the first 4 terms in the multiplication pattern given by the formula 2×4n