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sin^2θ
1 - cos^2θ
cos^2θ
1 - sin^2θ
sec^2θ
1 + tan^2θ
csc^2θ
1 + cot^2θ
Cominentary angles are equal for
Cofunctions
Cotθ
Domain: all reals except multiples of pi; Range: all reals
Tanθ
Domain: all reals except odd multiples of pi/2; Range: all reals
Secθ
Domain: all reals except odd multiples of pi/2; Range: all reals except -1,1
Cscθ
Domain: all reals except multiples of pi; Range: all reals except -1,1
Amplitude
y = Atrig(Bx + C) + D where abs(A) is the ____
Phase shift
y = Atrig(Bx + C) + D, where -C/B id the ____
Period
y = Atrig(Bx + C) + D, where the period of the parent function/B is the _____
sinx
cos( pi/2 - x)
cosx
sin( pi/2 - x)