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B04 Math
Question 8
2019 April(B04) Math Question 8
Trigonometry
- Pythagorean Theorem & sin cos tan
Choice G
$$x^{2}+40^{2}=50^{2}$$ $$\Rightarrow x^{2}=2500-1600=900$$ $$\Rightarrow x=30$$
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