研究生数学中三角函数的所有公式

归纳公式sin(-a)=-sin(a)cos(-a)= cos(a)sin(pi/2-a)= cos(a)cos(pi/2-a)= sin(a)sin(pi/2+a)= cos(a)cos(。sin(pi+a)=-sin(a)cos(pi+a)=-cos(a)TGA = tana = Sina/COSA三角函数sin(a+b)= sin(a)cos(b)+cos(α)sin(b)= sin(a)cos(b)-cos(a)sin(b)cos(a-b)= cos(a)cos(b)+sin(a)sin(b)Tan(a+b)=(Tan(a)+Tan(b))/(654386?1 sin(b)= 2 cos((a+b)/2)sin((a-b)/2)cos(a)+cos(b)= 2 cos((a+b)/2)cos(a ^ 2 *[cos(a+b)-cos(a-b)]cos(a)cos(b)= 1/2 *[cos(a+b)+cos(a-b)]sin(a)cos(b)= 1。= cos 2(A)-Sin 2(A)= 2cos 2(A)-1 = 1-2 Sin 2(A)半角公式Sin 2(A/2)=(1-cos(A))Sin(A)= Sin(A)/(1+cos(A))通用公式Sin(A)=(2 Tan(A/2)/(1+Tan 2(A/2))cos(A)=(65444双曲函数sinh(a)=(e a-e(-a))/2 cosh(a)=(e a+e(-a))/2 tgh(a)= sinh(a)/cosh(a)。