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Mathematics
Mathematics
Problem
Evaluate
S
=
sin
210
∘
+
csc
(
5
π
3
)
+
cot
(
−
45
∘
)
S=\sin 210^{\circ}+\csc\left(\dfrac{5\pi}{3}\right)+\cot\left(-45^{\circ}\right)
S
=
sin
21
0
∘
+
csc
(
3
5
π
)
+
cot
(
−
4
5
∘
)
. a)
−
1
2
−
2
3
-\dfrac{1}{2}-\dfrac{2}{\sqrt{3}}
−
2
1
−
3
2
b)
−
3
2
+
2
3
-\dfrac{3}{2}+\dfrac{2}{\sqrt{3}}
−
2
3
+
3
2
c)
−
3
2
−
2
3
-\dfrac{3}{2}-\dfrac{2}{\sqrt{3}}
−
2
3
−
3
2
d)
1
2
−
2
3
\dfrac{1}{2}-\dfrac{2}{\sqrt{3}}
2
1
−
3
2
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