AngouriMath
SolveByWritingASineOfAShiftedArgumentInTheOther(AngouriMath.Entity,AngouriMath.Entity.Variable,System.Boolean)
Method (no overloads)
Summary
The sines and cosines of one linear argument written in another of the same slope, where the
two differ by a constantd = A - B : sin(A) = sin(d) cos(B) + cos(d) sin(B) and
cos(A) = cos(d) cos(B) - sin(d) sin(B) , so that every trigonometric function is of
B . sin(a + b x) sec(c + b x)^3 is (sin(a - c) + cos(a - c) tan(c + b x)) sec(c + b x)^2 .
two differ by a constant
Remarks
Rubi's 4.7.1 has seventeen of these, each declined in a few milliseconds: nothing read two
arguments of which only one is a sine or a cosine. The same question in another spelling.
https://github.com/asc-community/AngouriMath/issues/718
arguments of which only one is a sine or a cosine. The same question in another spelling.
https://github.com/asc-community/AngouriMath/issues/718
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