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Mathematics
Mathematics
Problem
Choose the correct sign of the product
sin
(
−
405
∘
)
cos
(
17
π
6
)
\sin(-405^{\circ})\,\cos\!\left(\dfrac{17\pi}{6}\right)
sin
(
−
40
5
∘
)
cos
(
6
17
π
)
. a) Negative b) Positive c) Zero d) Cannot be determined without exact values
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