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Mathematics
Mathematics
Problem
Within the interval
(
−
3
π
2
,
3
π
2
)
\bigl(-\tfrac{3\pi}{2},\,\tfrac{3\pi}{2}\bigr)
(
−
2
3
π
,
2
3
π
)
, how many points satisfy the equation
sin
x
=
cos
x
\sin x = \cos x
sin
x
=
cos
x
? a) 4 b) 3 c) 2 d) 5
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