Question

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想問第二題 看不太懂解析在寫什麼

(1) (sin 43-sin 47")2 + (cos 43' + cos 47')² =
(2)*(sine
+ -)²+(cos +
sin 9
-(tan 0-
cos
tan 0
【答案】:(1)2 (2) 9
【解析】: (1)
(sin 43° - cos 43°) + (cos 43" + sin 43')"
shy3° - + Sints (0543° + (05k). * + cost.
(0.543" + Costs
= (Th`43° + cos" 43") ((05° 43' + sin" 43")
14122
=
(2)原式=(sin²+2+
+(cos²+2+-
(tan2 0-2+-
sin² 0
2
cose
tan² 8
1
sin² 0
cos² 0
+5-(
-2+
sin² cos²
1
2
.2
cos² 8 sin² 0
+7
sin² cos²
1
·+7-
sin² cos²
(sin²)² + (cos² )²
sin² cos²
(sin² + cos² )2-2 sin² cos²
sin² cos²
1
1-2 sin² 0 cos²
=
+7-
sin² cos² 6
1)
sin² cos² 0
1
120
sin² cos²
0
+7-2
sin² cos²
-2)=9
SS PRED

Answer 1

Duck

如圖