Trig
posted by Nada .
a) Determine the equation of a sine function that would have a range of {y€R7<(or equal) Y <(or equal) 1} and a period of 135degrees.
b) determine the cosine function that results in the same function an part (a).
Any help provided will be greatly appreciated.

your range is 8, so you need
4cos ??
period = 360/k
360/k = 135
135k = 360
k = 8/3
so far we have
y = 4cos (8/3)Ø
that would give us a max value of 4, but we want our max to be 1, so we have to drop our curve by 3 units
final:
y = 4cos(8/3)Ø  3 
Ok I was wondering why the zero with the slash was in the equation, i have never seen that before!