Cos²30 +cos²45+cos²60
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Answer: 3/2
Step-by-step explanation:
We know that ,cos 30 = √3/2 , cos 45 = 1/√2 , cos 60 = 1/2
To find : cos²30 + cos²45 + cos²60
= (√3/2)² + (1/√2)² + (1/2)²
= 3/4 + 1/2 + 1/4
= 3/4 + 2/4 + 1/4
= 6/4
= 3/2
HOPE THIS HELPS........
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