A) -1
B) \[\frac{1}{4}\]
C) 1
D) 0
Correct Answer: D
Solution :
(d): \[cos{{1}^{{}^\circ }}cos{{2}^{{}^\circ }}cos{{3}^{{}^\circ }}cos{{4}^{{}^\circ }}.....cos{{180}^{{}^\circ }}\]\[=0\left[ cos{{90}^{{}^\circ }}=0 \right]\]You need to login to perform this action.
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