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Area of a circle
A=πr2
Area of a trapezoid
A=(b1-b2)/2
Volume of a pyramid
V=(1/3)bh
Area of a triangle
A=(1/2)bh
Lateral surface area of a cylinder
S=2πrh
Circumference of a circle
C=2πr or C=πd
Surface area of a sphere
S=4πr2
Total surface area of a cylinder
S=2πrh+2πr2
Volume of a cone
V=(1/3)πr2h
Volume of a cylinder
V=πr2h
volume of a sphere
V=(4/3)πr3
Double angle identity for cos2x
(1+cos2x)/2
Double angle identity for sin2x
(1-cos2x)/2
sin2(x)
2sin(x)cos(x)
cos2x + sin2x
1
1 + cot2x
csc2x