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Mathematics
Mathematics
Problem
Which one of the following ordered pairs can represent
(
sin
θ
,
cos
θ
)
(\sin\theta,\cos\theta)
(
sin
θ
,
cos
θ
)
for some real angle
θ
\theta
θ
? a)
(
0.6
,
0.4
)
(0.6,\,0.4)
(
0.6
,
0.4
)
b)
(
−
2
2
,
2
2
)
\left(-\dfrac{\sqrt2}{2},\,\dfrac{\sqrt2}{2}\right)
(
−
2
2
,
2
2
)
c)
(
0.7
,
0.7
)
(0.7,\,0.7)
(
0.7
,
0.7
)
d)
(
3
2
,
2
2
)
\left(\dfrac{\sqrt3}{2},\,\dfrac{\sqrt2}{2}\right)
(
2
3
,
2
2
)
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