cos((–25⼀6)π)等于多少?

2025-04-14 11:25:58
推荐回答(2个)
回答1:

=cos(-25π/6+4π)
=cos(-π/6)
=√3/2

回答2:

cos(-25π/6)
=cos25π/6
=cos(4π+π/6)
=cosπ/6
=√3/2