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Trigonometry class 10 |
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Answer» (ii) →sin^4A-cos^4A→(sin^2A)^2-(cos^2A)^2→(sin^2A-cos^2A)(sin^2A+cos^2A)→(sin^2A-Cos^2A)(1)→(sin^2A-cos^2A)Formula USED1) a^2-b^2=(a+b)(a-b)IDENTITY used1) sin^2A+cos^2A=1Hope it will HELP you. |
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