Mathematics
Senior High
Resolved
我想問有關正餘弦的疊合問題
請問如果我將
cos θ 視為1/2
sin θ 視為-√3/2
算出2sin(x+5𝝅/3)其值也是可以的嗎？
先將方程式的左式化成正弦函數的形式: 456
y
元
sin(x-
1
3
c
sin x-√√3 cos x = 2(-
sx = 2( 11/1
y
sin x-
cos x)
2
2
(:0
200-200-
=2(sinx cos
3
=2sin(x- -)
3
- cos x sin ㄕㄨㄢ )
00)dia S
die 03
°0+ air =
元
元7元
-X
2元
6
…
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