数学三角公式1 + sin2x = (sinx + cosx) ^2用此信息,证明 (2(1+sin2x)) / (1
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数学三角公式
1 + sin2x = (sinx + cosx) ^2
用此信息,证明 (2(1+sin2x)) / (1 + sin2x + cos2x) = tanx +1
1 + sin2x = (sinx + cosx) ^2
用此信息,证明 (2(1+sin2x)) / (1 + sin2x + cos2x) = tanx +1
![数学三角公式1 + sin2x = (sinx + cosx) ^2用此信息,证明 (2(1+sin2x)) / (1](/uploads/image/z/5794387-43-7.jpg?t=%E6%95%B0%E5%AD%A6%E4%B8%89%E8%A7%92%E5%85%AC%E5%BC%8F1+%2B+sin2x+%3D+%28sinx+%2B+cosx%29+%5E2%E7%94%A8%E6%AD%A4%E4%BF%A1%E6%81%AF%2C%E8%AF%81%E6%98%8E+%EF%BC%882%281%2Bsin2x%29%29+%2F+%281)
(2(1+sin2x)) / (1 + sin2x + cos2x)
=2(sinx+cosx)^2/[(1+2sinxcosx+2cos^2x-1)]
=2(sinx+cosx)^2/[2cosx(sinx+cosx)]
=(sinx+cosx)/cosx
=(sinx/cosx)+(cosx/cosx)
=tanx+1
=右边.
=2(sinx+cosx)^2/[(1+2sinxcosx+2cos^2x-1)]
=2(sinx+cosx)^2/[2cosx(sinx+cosx)]
=(sinx+cosx)/cosx
=(sinx/cosx)+(cosx/cosx)
=tanx+1
=右边.
数学三角公式1 + sin2x = (sinx + cosx) ^2用此信息,证明 (2(1+sin2x)) / (1
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