NẾU SINA=3/5 0 M GA TGA BẰNG

Question

Câu 407: Nếu sina=3/5 0 M ga tga bằng:   thì cota  2cota) 7/25 b) 25/7 c) -7/25 d) -25/7  bằng:

Answer

a) 7/25 b) 25/7 c) -7/25 d) -25/7