Math, asked by suman61203, 3 days ago

find the value of cos690⁰

Answers

Answered by jda7

1

Answer:

the answer is root 2

dont understand why you put six on it or otherwise it will be root 1 by 2

Answered by sehajarsh

1

Write it as this
Cos(720-30)
This will come in the 4th quadrant where cos is positive
So, cos(720-30) = cos30= rt3/2

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