Math Question: Find the value of the tangent of angle A in a right triangle with opposite side length 3 and adjacent side length 4.
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Write a math question for the theme "Characteristics of cosine function f(x) = cos x":What is the amplitude, period, and domain of the function f(x) = cos(x)? How many x-intercepts does it have?
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Question: How many types of triangles can be formed if three different side lengths are selected from the set {4, 5, 6, 7, 8}?