Prove: sin ⁡ 2 θ ≥ 1 2 ( − 1 − 3 cos 2...

Lucia Grimes

Lucia Grimes

Answered

2022-07-14

Prove: sin 2 θ 1 2 ( 1 3 cos 2 θ )

Answer & Explanation

furniranizq

furniranizq

Expert

2022-07-15Added 20 answers

Hint: Since 1 = sin 2 ( t ) + cos 2 ( t ) and 2 sin ( 2 t ) = 4 sin ( t ) cos ( t )
2 sin ( 2 t ) + 1 + 3 cos 2 ( t ) = ( sin ( t ) + 2 cos ( t ) ) 2 .

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