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Mathematics, 05.10.2020 14:01 rebecabosca

If A+B+C=180°,then prove that;sin2A-sin2B+sin2C=4cosA. sinB. cosC
(related to trigonometry)

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If A+B+C=180°,then prove that;sin2A-sin2B+sin2C=4cosA. sinB. cosC
(related to trigonometry)...

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