Представьте в виде суммы: sin(a+b)*sin(a-b)
sin(a+b)*sin(a-b) = (sina*cosb + cosa*sinb)*(sina*cosb - cosa*sinb) =
(sina)^2*(cosb)^2 - (cosa)^2*(sinb)^2
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
sin(a+b)*sin(a-b) = (sina*cosb + cosa*sinb)*(sina*cosb - cosa*sinb) =
(sina)^2*(cosb)^2 - (cosa)^2*(sinb)^2