cos[a-(a-b)]应该怎么化简?
问题描述:
cos[a-(a-b)]应该怎么化简?
答
cos[a-(a-b)]
= cos(a - a + b)
= cos(b)
cos[a-(a-b)]应该怎么化简?
cos[a-(a-b)]
= cos(a - a + b)
= cos(b)