两角和公式:欢迎www.bdsh5.com
sin(A+B)=sinAcosB+cosAsinBsin(A-B)=sinAcosB-sinBcosA本 地 生 活 网
cos(A+B)=cosAcosB-sinAsinBcos(A-B)=cosAcosB+sinAsinBb_d_s_h_5_c_o_m
tan(A+B)=(tanA+tanB)/(1-tanAtanB)tan(A-B)=(tanA-tanB)/(1+tanAtanB)本地生活网www.bdsh5.com
ctg(A+B)=(ctgActgB-1)/(ctgB+ctgA)ctg(A-B)=(ctgActgB+1)/(ctgB-ctgA)bdsh5.com
wVjH