Question about functions and a identity Question
I have two quick questions about basic trig.My first question is asking to find period, amplitude, and phase shift of a function written as
f(x) = -cos(pi(x - 0.1))
Can i write the function as
f(x) = -cos(pi x - 0.1)?
Also I was asked to find the values of x between [0, 2pi] of the following equation
2sin^2 = 1
When i solve this equation I get
sinx = 1/ root 2
There is no special angle or this solution so would I use a decimal approximation?
Thanks for any help