Suppose cosine of x is equal to the fraction with numerator 1 and denominator square root of 5 and sine of x is greater than 0 What is the value of tangent of 2 x ?

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Suppose cosine of x is equal to the fraction with numerator 1 and denominator square root of 5 and sine of x is greater than 0 What is the value of tangent of 2 x ?

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