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जर cos A + cos2A = 1, तर sin2A + sin4A = ? - Mathematics 2 - Geometry [गणित २ - भूमिती]

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Question

जर cos A + cos2A = 1, तर sin2A + sin4A = ? 

Sum
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Solution

cos A + cos2A = 1   ......[दिलेले]

∴ cos A = 1 – cos2A

∴ cos A = sin2A    ......`[(because sin^2"A" + cos^2"A" = 1),(therefore 1 - cos^2"A" = sin^2"A")]`

∴ cos2A = sin4A     .....[दोन्ही बाजूंचे वर्ग करून]

∴ 1 – sin2A = sin4A

∴ 1 = sin4A + sin2A

∴ sin2A + sin4A = 1

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त्रिकोणमितीय नित्यसमानता
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Chapter 6: त्रिकोणमिती - Q ५)

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SCERT Maharashtra Geometry (Mathematics 2) [Marathi] 10 Standard SSC
Chapter 6 त्रिकोणमिती
Q ५) | Q २.
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