Trigonometry Formulas Involving Sum To Product Identities.
Advertisement
sinA+sinB = 2sin (A+B/2) cos(A−B/2)
sinA−sinB = 2cos (A+B/2) sin(A−B/2)
cosA+cosB = 2cos (A+B/2) cos(A−B/2)
cosA−cosB = –2sin (A+B/2) sin(A−B/2)
Math
Math Formula
- asked 3 years ago
- B Butts