y=asin(bx+c)+d

Mar 2010
27
0
One of the questions is
y=-4sin2(x+pi/2)

how do i get it into this form
y=asin(bx+c)+d

Thanks
 

galactus

MHF Hall of Honor
Jul 2006
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Chaneysville, PA
Is that \(\displaystyle -4sin(2(x+\frac{\pi}{2}))?.\)

Sometimes posters will not use ^ for power and write something like x2 for x^2. You do not mean \(\displaystyle -4sin^{2}(x+\frac{\pi}{2})?.\)
 
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Mar 2010
27
0
i double checked the question it is correct
 
May 2010
1,034
272
\(\displaystyle -4sin(2(x+\frac{\pi}{2}))\)

If the question really says that it is already in the required form, just expand the brackets to get

\(\displaystyle -4sin(2x+\pi)\)