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What is a good rule to find angles in a right angled triangle?

In any right angled triangle, for any angle:The sine of the angle = the length of the opposite side the length of the hypotenuseThe cosine of the angle = the length of the adjacent side the length of the hypotenuseThe tangent of the angle = the length of the opposite side the length of the adjacent sideSo in shorthand notation:sin = o/h cos = a/h tan = o/aOften remembered by: soh cah toa

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What is a good rule to find angles in a right angled triangle?

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