Question

喔剋恁聽

K怎麼算

6)如圖,
2.
coso - I
/
-
1
Tz
- 3 = 3x Tr cosa
&&
', tot i cos
- Trioso = -1
2 cos
) -
18 -45=135
(2, L, -4),若司,石的夾角為120°,則k = 1 1
- zk-2=To The toux
千人。
3
(26-2) = ax 44 x-t
& +20
T45
1
以
7
1
x
--
2
1
- 46 -84+4 = 36th