f3 trigonometric ratios

👨🏻‍🏫 學術台數學

Crystal

2011-01-16 7:21 am

1. It is given that tanθ=4/3 find the values of sinθ,cosθ and 2sinθcosθ/cos²θ- sin²θ
2.It is given that tanθ=12/5,find the values of sinθ and cosθ
3.It is given that tanθ=5/12,find the values of tanθ(sinθ+2cos²θ-1)

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RE 知識就是力量:係

回答 (2)

STEVIE-G™

2011-01-16 9:06 am

✔ 最佳答案

As follows:

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知識就是力量

2011-01-16 7:33 am

2sinθcosθ/cos²θ- sin²θ = 2sinθcosθ/(cos²θ- sin²θ)???

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