高中数学常用公式汇总

高中数学常用公式汇总

高中数学中常用的公式可以分为几个主要类别,包括三角函数、几何、代数等。以下是一些高中数学中常用的公式汇总:

三角函数公式

两角和与差

`sin(A + B) = sinAcosB + cosAsinB`

`sin(A - B) = sinAcosB - cosAsinB`

`cos(A + B) = cosAcosB - sinAsinB`

`cos(A - B) = cosAcosB + sinAsinB`

`tan(A + B) = (tanA + tanB) / (1 - tanAtanB)`

`tan(A - B) = (tanA - tanB) / (1 + tanAtanB)`

半角公式

`sin(A/2) = ±√((1 - cosA) / 2)`

`cos(A/2) = ±√((1 + cosA) / 2)`

`tan(A/2) = ±√((1 - cosA) / (1 + cosA))`

`cot(A/2) = ±√((1 + cosA) / (1 - cosA))`

倍角公式

`tan2A = 2tanA / (1 - tan^2A)`

`cot2A = (cot^2A - 1) / 2cotA`

`cos2A = 1 - 2sin^2A`

`sin^2A + sin^2(A - 2π/3) + sin^2(A + 2π/3) = 3/2`

多倍角公式

`sin4A = -4(cosA * sinA * (2sin^2A - 1))`

`cos4A = 1 + (-8cos^2A + 8cos^4A)`

`tan4A = (4tanA - 4tan^3A) / (1 - 6tan^2A + tan^4A)`

`sin5A = 16sin^5A - 20sin^3A + 5sinA`

`cos5A = 16cos^5A - 20cos^3A + 5cosA`

`tan5A = tanA * (5 - 10tan^2A + tan^4A) / (1 - 10tan^2A + 5tan^4A)`

`sin6A = 2(cosA * sinA * (2sinA - 1) * (2sinA + 1) * (-3 + 4sin^2A))`

`cos6A = (-1 + 2cos^2A) * (16cos^4A - 16cos^2A + 1)`

`tan6A = (-6tanA - 20tan^3A - 6tan^5A) / (-1 + 15tan^2A + 15tan^4A + tan^6A)`

`sin7A = -(sinA * (56sin^2A - 112sin^4A - 7 + 64sin^6A))`

`cos7A = (cosA * (56cos^2A - 112cos^4A + 64cos^6A - 7))`

`tan7A = tanA * (-7 - 35tan^2A - 21tan^4A - tan^6A) / (-1 + 21tan^2A + 35tan^4A + 7tan^6A)`

`sin8A = -8(cosA * sinA * (2sin^2A - 1) * (-8sin^2A + 8sin^4A + 1))`

`cos8A = 1 + (160cos^4A - 256cos^6A + 128cos^8A - 32cos^2A)`

`tan8A = -8tanA * (-1 - 7tan^2A - 7tan^4A - tan^6A) / (1 - 28tan^2A + 70tan^4A + 28tan^6A