Pre calc find amplitude period phase shift endpoint?

Question

How do you solve this need help asap, thank you!!

Find amplitude,period, phase shift and endpoint

1). y= cos 2( x- (pie/2)

2). y= 2sin (1/2)x - (pie/6)

Answer 1

for your reference:

https://answers.yahoo.com/question/index?qid=20120...

1). y= cos 2[x- (π/2)]

2). y= 2sin [(1/2)x - (π/6)] = 2sin[1/2(x - π/3)]