If angle A = 30° and show that sin A = to root 1 minus Cos 2A upon 2�

1.	If angle A = 30° and show that sin A = to root 1 minus Cos 2A upon 2
Answer» Given: ∠A = 30° To Prove: sinA = √[(1 - Cos2A)/2] Proof: In attachment Here, we have some concepts through which you can understand QUESTION and SOLUTION better. Concepts sin30° = ½ cos60° = sin30° = ½ Remember Don't forget cos2A where 2 is in MULTIPLICATION with angle A. Solve factional VALUES careful.

If angle A = 30° and show that sin A = to root 1 minus Cos 2A upon 2

Answer»

Given: ∠A = 30°

To Prove: sinA = √[(1 - Cos2A)/2]

Proof: In attachment

Here, we have some concepts through which you can understand QUESTION and SOLUTION better.

Concepts

sin30° = ½
cos60° = sin30° = ½

Remember

Don't forget cos2A where 2 is in MULTIPLICATION with angle A.
Solve factional VALUES careful.

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If angle A = 30° and show that sin A = to root 1 minus Cos 2A upon 2​

Concepts

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If angle A = 30° and show that sin A = to root 1 minus Cos 2A upon 2