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April 18, 2014

Homework Help: Math

Posted by Crystal on Tuesday, December 11, 2012 at 7:47pm.

For f(x) = 1/2sin2(x-90)

What are the transformations?

The 1/2 means a vertical compression by a factor of 1/2

And (x-90) means there's a phase shift right 90

But what does the 2 mean? The one immediately left to the (x-90).

Does it mean a horizontal compression by factor of 1/2?

Because when I draw the graph for it going by what I have above, I get something different from what I calculate the main 5 points as :

(x,y) -> (2x+90, 1/2y)
(0,0) -> (90, 0)
(90,1)-> (270, 1/2) ... When I draw the graph, the point I get is (270, 0).

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