Bentuk sederhana 3-3 cos 2 Q​

IDENTITAS TRIGONOMETRI

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Note :

cos²x + sin²x = 1

cos²x = 1 – sin²x

cos 2x = cos²x -sin²x

cos 2x = (1 – sin²x) – sin²x

cos 2x = 1 – 2sin²x

2 sin²x = 1 – cos 2x

= 3 – 3 cos 2Q

= 3 (1 – cos 2Q)

= 3 (2 sin² Q)

= 6 sin² Q

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