# Math Help - trigo function

1. ## trigo function

y=2sinx

what is the effect of 2 in the equation above?
someone pls help me with this..

2. Originally Posted by myra
y=2sinx

what is the effect of 2 in the equation above?
someone pls help me with this..
The two doubles the amplitude of the graph. This means that your range is now $-2 \leq x \leq 2$

It also means that your graph goes from -2 to +2 in the same "space" (which is $\pi$ in this case)

Edit: More generally $A\sin(x)$ will have a range of $-A \leq x \leq A$ and will go from $-A$ to $A$ in $\pi$ radians.

See the attached graph for how this would look, green is 2sin(x) and blue is sin(x) for comparison