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Problem
Problem
Calculate the following values without using a calculator: a. (i)
sin
(
−
210
∘
)
\sin(-210^{\circ})
sin
(
−
21
0
∘
)
b. (ii)
cos
(
13
π
6
)
\cos\left(\dfrac{13\pi}{6}\right)
cos
(
6
13
π
)
c. (iii)
cot
(
13
π
6
)
\cot\left(\dfrac{13\pi}{6}\right)
cot
(
6
13
π
)
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