【资料图】

1、cos1=0.54030230586814 sin1=0.8414709848079 cos0=1sin0=0cos30°=√3/2sin30°=1/2 cos45°=√2/2 sin45°=√2/2cos60°=1/2 sin60°=√3/2cos90°=0 sin90°=1 cos120°=-1/2 sin120°=√3/2cos135°=-√2/2 sin135°=√2/2 cos150°=-√3/2 sin150°=1/2cos180°=-1 sin180°=0cos210°=-√3/2 sin210°=-1/2cos225°=-√2/2 sin225°=-√2/2cos240°=-1/2sin240°=-√3/2cos270°=0 sin270°=-1cos300°=1/2 sin300°=-√3/2cos315°=√2/2 sin315°=-√2/2cos330°==√3/2sin330°=-1/2cos360°=1 sin360°=0诱导公式sin(-a)=-sin(a) cos(-a)=cos(a) sin(π/2-a)=cos(a) cos(π/2-a)=sin(a) sin(π/2+a)=cos(a) cos(π/2+a)=-sin(a) sin(π-a)=sin(a) cos(π-a)=-cos(a) sin(π+a)=-sin(a) cos(π+a)=-cos(a) tgA=tanA=sinA/cosA两角和与差的三角函数sin(a+b)=sin(a)cos(b)+cos(α)sin(b) cos(a+b)=cos(a)cos(b)-sin(a)sin(b) sin(a-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))/(1-tan(a)tan(b)) tan(a-b)=(tan(a)-tan(b))/(1+tan(a)tan(b))三角函数和差化积公式sin(a)+sin(b)=2sin((a+b)/2)cos((a-b)/2) sin(a)−sin(b)=2cos((a+b)/2)sin((a-b)/2) cos(a)+cos(b)=2cos((a+b)/2)cos((a-b)/2) cos(a)-cos(b)=-2sin((a+b)/2)sin((a-b)/2)积化和差公式sin(a)sin(b)=-1/2*[cos(a+b)-cos(a-b)] cos(a)cos(b)=1/2*[cos(a+b)+cos(a-b)] sin(a)cos(b)=1/2*[sin(a+b)+sin(a-b)]二倍角公式sin(2a)=2sin(a)cos(a) cos(2a)=cos^2(a)-sin^2(a)=2cos^2(a)-1=1-2sin^2(a)半角公式sin^2(a/2)=(1-cos(a))/2 cos^2(a/2)=(1+cos(a))/2 tan(a/2)=(1-cos(a))/sin(a)=sin(a)/(1+cos(a))万能公式sin(a)= (2tan(a/2))/(1+tan^2(a/2)) cos(a)= (1-tan^2(a/2))/(1+tan^2(a/2)) tan(a)= (2tan(a/2))/(1-tan^2(a/2))其它公式a*sin(a)+b*cos(a)=sqrt(a^2+b^2)sin(a+c) [其中。

2、tan(c)=b/a] a*sin(a)-b*cos(a)=sqrt(a^2+b^2)cos(a-c) [其中。

3、tan(c)=a/b] 1+sin(a)=(sin(a/2)+cos(a/2))^2 1-sin(a)=(sin(a/2)-cos(a/2))^2其他非重点三角函数csc(a)=1/sin(a) sec(a)=1/cos(a)双曲函数sinh(a)=(e^a-e^(-a))/2 cosh(a)=(e^a+e^(-a))/2 tgh(a)=sinh(a)/cosh(a)。

相信通过正弦余弦这篇文章能帮到你，在和好朋友分享的时候，也欢迎感兴趣小伙伴们一起来探讨。