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olga2289 [7]
3 years ago
6

One leg of a right triangle is twice the length of the other leg. What is the cosine of the angle between the longer leg and the

hypotenuse?
History
1 answer:
viktelen [127]3 years ago
3 0
 <span>Let x denote the length of the shorter leg. Then the longer leg has length 2x. The hypotenuse of the triangle has length √(x² + (2x)²) = √5 x. 

The cosine of the angle formed by the longer leg and the hypotenuse is 2x/(√5 x) = 2/√5 = 2√5 / 5 

The cosine of the other acute angle is x/(&radc;5 x) = 1/√5 = √5 / 5</span>
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