the value of cos 5π is
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Answer:
Since we are considering a unit circle the value will be negative one. Negative sign is used because π lies on the negative x-axis. Therefore,cos5π=−1 .
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SOLUTION
TO DETERMINE
The value of cos 5π
EVALUATION
We have to find the value of cos 5π
cos 5π
= cos ( 5 × 180° )
= cos 900°
= cos ( 10 × 90° + 0° )
= - cos 0°
= - 1
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