find the value of cos (-1710°).
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Answer:
Step-by-step explanation:
Value of Cos(-1710∘)
cos(−1710∘) = cos(1710∘) ∵cos(−x)=cos(x)
cos(1710∘) = cos(1800∘−90∘)
cos(1710∘) = cos(360∘⋅5−90∘)
cos(1710∘) = cos(−90∘) ∵cos(360∘⋅n±x)=cos(±x)
cos(1710∘) = cos(90∘)=0
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