Trigonometry Formulas Involving Product Identities.
sinA sinB=1/2[cos(A–B)−cos(A+B)]
cosAcosB=1/2[cos(A–B)+cos(A+B)]
sinAcosB=1/2[sin(A+B)+sin(A−B)]
cosAsinB=1/2[sin(A+B)–sin(A−B)]
Math
Math Formula
- asked 3 years ago
- B Butts
sinA sinB=1/2[cos(A–B)−cos(A+B)]
cosAcosB=1/2[cos(A–B)+cos(A+B)]
sinAcosB=1/2[sin(A+B)+sin(A−B)]
cosAsinB=1/2[sin(A+B)–sin(A−B)]
