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Mathematics
Mathematics
Problem
Which of the following expressions gives the x-component of a vector of magnitude
A
A
A
that makes an angle
θ
\theta
θ
with the positive x-axis in the x–y plane? a)
A
sin
θ
A\sin\theta
A
sin
θ
b)
A
cos
θ
A\cos\theta
A
cos
θ
c)
A
cos
θ
\dfrac{A}{\cos\theta}
cos
θ
A
d)
−
A
cos
θ
-A\cos\theta
−
A
cos
θ
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