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標題:
發問:
4sinθ - 3tanθ = 0, where 0?≦θ < 360? (cor. to 1 d.p.) ans: 0?, 41.4?, 180?, 318.6?
最佳解答:
4sinθ - 3tanθ = 0, where 0? <= θ < 360? (cor. to 1 d.p.) 4sinθ – 3sinθ/cosθ = 0 4sinθcosθ – 3sinθ = 0 sinθ ( 4cosθ – 3 ) = 0 sinθ = 0 or 4cosθ – 3 = 0 When sinθ = 0 θ = 0? or 180? When 4cosθ – 3 = 0 cosθ = 3/4 θ = 41.4? or 318.6? Ans. : θ = 0?, 41.4?, 180?, 318.6?
其他解答:FAD2A23AB937987B
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S.4 trigo(急急急)~發問:
4sinθ - 3tanθ = 0, where 0?≦θ < 360? (cor. to 1 d.p.) ans: 0?, 41.4?, 180?, 318.6?
最佳解答:
4sinθ - 3tanθ = 0, where 0? <= θ < 360? (cor. to 1 d.p.) 4sinθ – 3sinθ/cosθ = 0 4sinθcosθ – 3sinθ = 0 sinθ ( 4cosθ – 3 ) = 0 sinθ = 0 or 4cosθ – 3 = 0 When sinθ = 0 θ = 0? or 180? When 4cosθ – 3 = 0 cosθ = 3/4 θ = 41.4? or 318.6? Ans. : θ = 0?, 41.4?, 180?, 318.6?
其他解答:FAD2A23AB937987B
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