prove that sin (A+B)+sin (A-B)/ cos (A+B)+cos (A-B) = tan A - Maths - Trigonometric Functions

Question

prove that sin (A+B)+sin (A-B)/ cos (A+B)+cos (A-B) = tan A

- X - · Answer

Please find this answer
<img src=
"https://s3mn%20mnimgs%20com/img/shared/content_ck_images/ck_5bb3176789b0d%20png">