Question

鮪魚

請問這題的(5）要怎麼算

動
3
=-
2
5
4.
(
50 = 360.0i
=COS
2
2
03 - 16 46
( 181
手做图設4,8,9,84 分別為第一、第二、第三及第四象限角,且都介於0到360°之間,
Esin 0,1 = sin 0,1 = |sin 631 = | sin 0,1 = ,則下列哪些選項是正確的?(多選)
203
02 03
(1)0, < 45° (2) 0, +02=180° (3) cos6, (4) cos
5
2
3
(5)02=0z+90°• sing, = sinon
(+。
2/3 sind 3 sino a =
-
-5
答
il sing,
(3) coso – – I
sing, a 45
(4, 02:18-003:18 +0.
=
(2, sing, = sin (18.0)=sing = sind, coso = cos( 18-01)
, ,
: )
19
Roco qoo, 0 <0iLqo
collage
= cos( quo 0 ) = sina
23
0,18-01 > 0. + 18
us
as (18+) = cos 1904
s
sin 45 = 12
2
(1:0,#4
1.2
O₂ = ,
156
<
1
103
)
.
'(
sin
91

Answer 1

Wonder

如