find the value of cos 270°
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Value is 0°
Cos 270° = 0°
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Answer:
Value is 0
Step-by-step explanation:
cos270∘
=cos(180∘+90∘)
180∘+θ is in third quadrant.By ASTC rule, cosθ is negative in third quadrant.
Hence cos(180∘+60∘)=cos90∘=0
Hope it helps you
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