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Mathematics
Mathematics
Problem
Determine the coordinates
(
cos
θ
,
sin
θ
)
(\cos \theta, \sin \theta)
(
cos
θ
,
sin
θ
)
on the unit circle for
θ
=
−
13
π
4
\theta = -\dfrac{13\pi}{4}
θ
=
−
4
13
π
. a)
(
2
2
,
−
2
2
)
\left(\dfrac{\sqrt{2}}{2},\; -\dfrac{\sqrt{2}}{2}\right)
(
2
2
,
−
2
2
)
b)
(
−
2
2
,
2
2
)
\left(-\dfrac{\sqrt{2}}{2},\; \dfrac{\sqrt{2}}{2}\right)
(
−
2
2
,
2
2
)
c)
(
−
2
2
,
−
2
2
)
\left(-\dfrac{\sqrt{2}}{2},\; -\dfrac{\sqrt{2}}{2}\right)
(
−
2
2
,
−
2
2
)
d)
(
2
2
,
2
2
)
\left(\dfrac{\sqrt{2}}{2},\; \dfrac{\sqrt{2}}{2}\right)
(
2
2
,
2
2
)
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