Trig Identity All-In-One Solver with the TiNspire CX

To Solve Sum and Difference Angle Identities such as
sin(A+B)=sin(A)*cos(B)+cos(A)*sin(B) , etc
start the Trigonometry Made Easy app at and select option 7 as shown below:

Next enter the given sine or cosine values and the given quadrants, the solutions show automatically in the bottom box. See below:

And here view the two cosine solutions:

Couldn’t be any simple ūüėČ