（可自己下载学习使用，请勿转载录播）高等教育自学考试（自考）高等数学（工本）00
2023-07-30 16:14 作者:bili_3461564300528125 | 我要投稿
y=sinx
y=cosx
y=tanx = sinx/cosx
y=cotx = cosx/sinx
y=secx = 1/cosx
y=cscx = 1/sinx
sin^2x +cos^2x = (a^2+b^2)/c^2 = 1
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)
sin(2a) = 2sinacosa
cos(2a) = cos^2a-sin^a = 2cos^2a-1 = 1-2sin^2a
tan(2a) = 2tana/(1-tan^2a)
