有關sine既問題
1.2tan0=11
2.tan20=11
3.2tan20=11
4.3sin0-1=1
5.2sin0+3=4
6.9sin0-2=6
7.cos0+1=1
8.sin20+2=2.5
所有0係sine符號既0中間加一橫線既0,需列式!
回答 (1)
✔ 最佳答案
1.2tanθ=11
tanθ = 5.5
θ = 79.7o
2.tan2θ=11
2θ= 84.8o
θ = 42.4o
3.2tan2θ=11
tan2θ=5.5
2θ = 79.7 o
θ = 39.8 o
4.3sinθ-1=1
3sinθ = 2
sinθ = 2/3
θ = 41.8o
5.2sinθ+3=4
2sinθ = 1
sinθ = 1/2
θ = 30 o
6.9sinθ-2=6
9sinθ = 8
sinθ = 8/9
θ = 62.7o
7.cosθ+1=1
cosθ = 0
θ = 90 o
8.sin2θ+2=2.5
sin2θ = 0.5
2θ = 30
θ = 15 o
收錄日期: 2021-04-12 22:59:03
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