Formula for 2SinASinB is written as the difference of thecos(A - B)andcos(A + B). Therefore, the trigonometric formula for 2SinASinB is given by, 2SinASinB = cos(A - B) - cos(A + B), for compound angles A + B and A - B. Using this formula, we have the formula for sin...
sina sinb = (1/2)[cos(a - b) - cos(a + b)]. Sina Sinb is an important formula in trigonometry that is used to simplify various problems in trigonometry.
cos(a-b)=cosacosb+sinasinb tan(a+b)=(tana+tanb)/(1-tanatanb) tan(a-b)=(tana-tanb)/(1+tanatanb) cot(a+b)=(cotacotb-1)/(cotb+cota) cot(a-b)=(cotacotb+1)/(cotb-cota) 倍角公式 tan2a=2tana/[1-(tana)^2] cos2a=(cosa)^2-(sina)^2=2(cosa)^2 -1=1-2(sina)^2 ...
Sin (pi/2-a) =cos (a)Cos (pi/2-a) =sin (a)Sin (pi/2+a) =cos (a)Cos (pi/2+a) =-sin (a)Sin (pi-A) =sin (a)Cos (pi-A) =-cos (a)Sin (pi+a) =-sin (a)Cos (pi+a) =-cos (a)TgA=tanA=sinA/cosA The horns and trigonometric function and difference Sin (a+b...
absinC=2R2sinAsinBsinC=a2sinBsinC/2sinANote:Ristheradiusofexcircle.9.calculatetheareabyvectors:Sdelta)=?2root(|AB|*|AC|)-(AB*AC)².10.intheCartesiancoordinatesystem,theareaofthetriangleABCisS=|AB*AC|/2Thatis,theareaSisequaltohalfthenormofthevectorABandtheproductoftheACvectorExtendedreading...
sin(a-b)=sinacosb-sinbcosa cos(a+b)=cosacosb-sinasinb cos(a-b)=cosacosb+sinasinb tan(a+b)=(tana+tanb)/(1-tanatanb) tan(a-b)=(tana-tanb)/(1+tanatanb) cot(a+b)=(cotacotb-1)/(cotb+cota) cot(a-b)=(cotacotb+1)/(cotb-cota) ...
2. known triangles, three sides a, B, C, then (Helen formula) (p= (a+b+c) /2)S=sqrt[p (P-A) (P-B) (P-C)]=sqrt[(1/2) (a+b+c) (a+b-c) (a+c-b) (b+c-a)]V = 2/2sqrt[(a+b+c) (a+b-c) (a+c-b) (b+c-a)]3., a and B on both sides of the ...
2)Excel function formulaExcel函数公式 1.The application of Excel function formula in human resource management;Excel函数公式在人事工作中的应用 3)rational fractional function有理公式函数 4)Density Function Formula密度函数公式 1.Note on the Density Function Formulas;关于密度函数公式的注记 英文短句/例句 ...
Long radius * short radius *PAI* calculation formula of ellipse ellipse object high volume Trigonometric function: The horns and formula Sin (A+B) =sinAcosB+cosAsinB sin (A-B) =sinAcosB-sinBcosA Cos (A+B) =cosAcosB-sinAsinB cos (A-B) =cosAcosB+sinAsinB Tan (A+B) = (tanA+tanB)...
Angle formula The triangle rule The hyperbolic function Important theorem of sinusoids Cosine theorem Expand the relevant concepts of this section Acute triangle function triangle Reciprocal relationship: tangent alpha - cotangent alpha = 1 The sine of alpha, CSC alpha = 1 Cosine of alpha, the SEC...