Help fast please!! will give brainliest!!
the difference in length of a spring on a pogo stick from its non-compressed length when a teenager is jumping on it after (theta) seconds can be described by the function f(theta)=2sin(theta)+sqrt2

part a: determine all values where the pogo stick's spring will be equal to it's non compressed length

part b: if the angle was doubled, that (theta) became two(theta), what are the solutions in the interval [0, 2pi]? how do these compare to the original function?

part c: a toddler is jumping on another pogo stick whose length of its spring can be represented by the function g(theta)=1-cos^2(theta)+sqrt2. at what times are the springs from the original pogo stick and the toddlers pogo stick lengths equal?