Addition and double angle formulas for various trig and hyperbolic functions
Trigonometric Functions
Hyperbolic Functions
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Addition and double angle formulas for various trig and hyperbolic functions
cos(x+y)=cos(x)cos(y)−sin(x)sin(y) sin(x+y)=sin(x)cos(y)+cos(x)sin(y)
cos(2x)=cos2(x)−sin2(x) cos(2x)=2cos2(x)−1 cos(2x)=1−2sin2(x) sin(2x)=2sin(x)cos(x)
cosh(x+y)=cosh(x)cosh(y)+sinh(x)sinh(y) sinh(x+y)=sinh(x)cosh(y)+cosh(x)sinh(y)
cosh(2x)=cosh2(x)+sinh2(x) cosh(2x)=2cosh2(x)−1 cosh(2x)=1+2sinh2(x) sinh(2x)=2sinh(x)cosh(x)