"10cos13" - 1 õppematerjal

Siinused ja Coosinused

(a±b)³=a³±3a²b+3ab²±b³ Sin/cos=tan (a±b)(a²-+ab+b²)=a³±b³ Sin²+cos²=1 1+tan²=1/cos² c=a²+b²-2ab*cos cost tan*cot=1 cos=(b²+c²-a²)/2bc sint cot=cos/sin S=[p(p-a)(p-b)(p-c)] 1+cot²=1/sin² p=P/2_S=p*r_S=abc/4R a/sin=b/sin=c/sin=2R Sin(±)=sin*cos±sin*cos S=(ab*sin)/2 Cos(±)=cos*cos-+sin*sin Tan(±)=(tan±tan)/(1-+tan*tan) sin2=2sin*cos sin/2=±[(1-cos)/2] cos2=cos²-sin² cos/2=±[(1+cos)/2] tan2=2tan/(1-tan²) tan/2=±(1-cos)/(1+cos) tan/2=(1-cos)/sin l=xr l=/360°*2r tan/2=sin/(1+cos) S=xr²/2 S=/360°*r² 030°45°60°90°180°270°360°Sin00,52:23:21 0-10Cos13:22:20,50-101Tan03:313-0- 0Cot-313:30-0-