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標題: 最後幾題.....數學~唔洗手help me~ [打印本頁]

作者: 0o越前龍馬o0 時間: 09-4-16 10:36 PM 標題: 最後幾題.....數學~唔洗手help me~

1. (a) Solve sinθ = 1 for 0' < θ < 360'
(b) Solve 3tanθ - √3 = 0 for 0' < θ < 360'

2. (a) Simplify sin(180'-θ)．cos(90'-θ)
(b) Simplify tan(180'+θ)cos(180'-θ)/sin(180'+θ)

註: √=開方 '=度．=乘 /=分線

作者: 去完廁所唔洸手 時間: 09-4-16 10:42 PM

1a. 90
b. 30,210

第2題個d我唔係太記得... 希望一陣有高人經過幫你=.='

作者: Naozumi 時間: 09-4-16 10:45 PM

sin(180'-θ)．cos(90'-θ) = sinθ．sinθ = sin^2 θ

tan(180'+θ)cos(180'-θ)/sin(180'+θ) = tanθ(-cosθ)/(-sinθ) = 1

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