Question

one more problem cos 420°

Answer 1

Answer :

Now, cos420°

= cos(360° + 60°)

= cos60°, since cos(360° + θ) = cosθ

= 1/2

#MarkAsBrainliest

Answer 2

Cos420

=> cos(360 + 60)

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We know, cos(360+∅) = cos∅
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=> cos60

=> 1/2


I hope this will help you

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