k=(2sin^2a+sin2a)/(1+tana) 则sin(a-3.14/4)的值

k=(2sin^2a+sin2a)/(1+tana) 则sin(a-3.14/4)的值
k=(2sin^2a+sin2a)/(1+tana) 则sin(a-3.14/4)的值

k=(2sin^2a+sin2a)/(1+tana) 则sin(a-3.14/4)的值
k=(2sin^2a+sin2a)/(1+tana)
＝2sinacosa(sina+cosa)/(cosa+sina)
=2sinacosa=sin2x≤1
1-k=1-2sinacosa
sina-cosa=±√(1-k)
sin(a-∏/4)
=√2/2(sina-cosa)
==±√[2(1-k)]/2

3.14 6.28 9.42 12.56 15.7 18.84 21.98 25.12 28.26 31.4 34.54 37.68 40.82 43.96 47.1 50.24 53.38 56.52 59.66 62.8 65.94 69.08 72.22 75.36 78.5 81.64 84.78 87.92 91.06 94.2 ...

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3.14 6.28 9.42 12.56 15.7 18.84 21.98 25.12 28.26 31.4 34.54 37.68 40.82 43.96 47.1 50.24 53.38 56.52 59.66 62.8 65.94 69.08 72.22 75.36 78.5 81.64 84.78 87.92 91.06 94.2 97.34 100.48 103.62 106.76 109.9 113.04 116.18 119.32 122.46 125.6 128.74 131.88 135.02 138.16 141.3 144.44 147.58 150.72 153.86 157 160.14 163.28 166.42 169.56 172.7 175.84 178.98 182.12 185.26 188.4 191.54 194.68 197.82 200.96 204.1 207.24 210.38 213.52 216.66 219.8 222.94 226.08 229.22 232.36 235.5 238.64 241.78 244.92 248.06 251.2 254.34 257.48 260.62 263.76 266.9 270.04 273.18 276.32 279.46 282.6 285.74 288.88 292.02 295.16 298.3 301.44 304.58 307.72 310.86 314

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