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Proove that vii. sin^4 θ – cos^4 θ = 1 – 2 cos^2 θ
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Sep 30
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Trigonometry
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Brainiak
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Proove that vii.
\(sin^4 θ – cos^4 θ = 1 – 2 cos^2 θ\)
trigonometry practice set 6.1
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Sep 30
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Brainiak
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Hence , prooved
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