Question

Aline

高二數學，急求解！！

14 (1) tan(a-B)=3. cot(B-1) = 2 · * tan(y-a)=
(2) tan(a-B)= 2 · cot(a-7)=3 · * tan(2a -B-1) =

三角函數

Answer 1

玄玄.

5.
(2)同理