Studied by 32 peoplePythagorean identity (cs)
cos^2(x) +sin^2(x) = 1
Double angle identities (sin)
2sin(x)(cos(x)) = sin(2x)
Double angle identities (cos)
cos^2(x) - sin^2(x) = cos(2x)
secant reciprocal
sec(x) = 1/cos(x)
cosecant reciprocal
csc(x) = 1/sin(x)
cotangent reciprocal
cot(x) = 1/tan(x)
Pythagorean identities (st)
1 + tan^2(x) = sec^2(x)
Pythagorean identities (cc)
1 + cot^2(x) = csc^2(x)
Double angle identities (tan)
2tanx/(1-tan^2(x)) = tan(2x)
sine derivative
dy/dx = cos(x)
cosine derivative
dy/dx = -sin(x)
tangent derivative
dy/dx = sec^2(x)
secant derivative
dy/dx = sec(x)tan(x)
cosecant derivative
dy/dx = -csc(x)cot(x)
cotangant derivative
dy/dx = -csc^2(x)
Note
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