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Trig identities

OriginalEquivilant
sin(2x) 2sin(x)cos(x)
cos(2x) cos²(x)-sin²(x)
tan(2x) 2tan(x)/(1-tan²(x))
sin(a±b) sin(a)cos(b)±cos(a)sin(b)
cos(a±b) cos(a)cos(b)∓sin(a)sin(b)
tan(a±b) tan(a)±tan(b)/(1∓tan(a)tan(b))
a^2 - b^2 (a-b)(a+b)
difference of squares formula is applied when multiplying by conjugates
conjugate of a+b a-b
sinx/x as x goes to zero one
Created by: user-1749353
 

 



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