> 数学 >
f(x)=cos(wx+y)-sin(wx+y)化简
人气:106 ℃ 时间:2020-02-05 16:04:25
解答
f(x)=√2[(√2/2)cos(wx+y)-(√2/2)sin(wx+y)]
=√2[cos(wx+y)cos(π/4)-sin(wx+y)sin(π/4)]
=√2cos(wx+y+π/4)
推荐
猜你喜欢
© 2026 79432.Com All Rights Reserved.
电脑版|手机版