> 数学 >
化简cos(π/3-θ)cosθcos(π/3+θ)
人气:393 ℃ 时间:2020-05-26 12:40:03
解答
cos(π/3-θ)cosθcos(π/3+θ)=[cos(π/3-θ+π/3+θ)+cos(π/3-θ-π/3-θ]cosθ/2=(cosθ)^3-3cosθ/4
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版