The point of multiplication and factorization A2-B2 = (a+b) (a-b) A3+B3 = (a+b) (A2-AB+B2) A3-B3 = (A-B (A2+AB+B2) Trigonometric Inequality | A+B |≤| A |||||||||||||||||||||||||||||||||||||||||||| | | | | | | | A | b | a | b | a | a | b | a | b | a | b | a | b | a | b | a | b | a | b | b | a | b | b | a | a | a | b | b | B0Note. =√(( 1-COSA)/2)SIN(A/2)=√(( 1-COSA)/2)COS(A/2)=√(( 1-COSA)/(( 1+COSA))tan(A/2)=√(( 1-COSA)/((65438) sinA+sinB = 2 sin((A+B)/2)cos((A-B)/2 cosA+cosB = 2cos((A+B)/2)sin((A-B)/2)tanA+tanB = sin(A+B)/cosA cosB tanA-tanB = sin(A-B)/ The first n terms of the partial sequences of COSA COSB CTGA+CTGBSIN (A+B)/SINAB and 1+2+3+4+5+6+ 0 parabolic standard equation Y2 = 2PXY2 =-2PXX2 =-2PX lateral area S=c*h Oblique prism lateral area S=c'*h Regular pyramid lateral area S = The l surface area of the ball S=4pi*r2, the cylindrical lateral area S=c*h=2pi*h, the conical lateral area S= 1/2*c*l=pi*r*l, and the arc length formula l=a*r a is the radian number of the central angle r >; 0 sector area formula s= 1/2*l*r cone volume formula V= 1/3*S*H cone volume formula V= 1/3*pi*r2h oblique prism volume V=S'L note: where s' is the straight cross-sectional area, and l is the one with a long cylinder with a side.