Which graph represents a phase shift of π/2 units left for the graph of y = sinx ?

Question

anonymous · Answer

A. y = sin (x - (π/2))
B. y = cos x
C. y = sec x
D. y = csc x

terenzreignz · Answer

Well, only one of them looks so unlike the others that it most probably has the phase shift :P

anonymous · Answer

But its not A.

terenzreignz · Answer

But in all seriousness, the phase-shift is that constant added to the x (inside the trig function)
$$\Large y = \sin(px+q)$$In that case, there is a phase shift of $\huge \frac{q}p$ units to the left...

terenzreignz · Answer

whoops... sorry about that...

anonymous · Answer

Its okay! The only thing I can think of is co"sine"

terenzreignz · Answer

I guess you use this fact...
$$\Large \sin\left(\frac\pi 2 - x\right)=\cos(x)$$

anonymous · Answer

Yup, B.

terenzreignz · Answer

I'm actually now confused... oh well, it usually comes with weekends... 
LOL
Signing off now... 
-------------------------
Terence out