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If sin theta + sin^2 theta + sin^3 theta= 1, prove that cos^6 theta -4cos^4 theta + 8cos^2 theta=4.
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R D Sharma trigonometry - Example -44 | If sin theta + sin^2 theta + sin^3 theta= 1, prove that cos^6 theta -4cos^4 theta + 8cos^2 theta=4. Trigonometry class 10 |
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