What is the value of tan (x-90)? - Quora

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If tan (x+y) =1/3 and tan y =1/2, what is tan x? - Quora

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What is the minimum value of a.tan(x) + b.cot(x)? - Quora

What is the formula of tan(90 - A)? - Quora

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What are the solutions for x=tan(x)? - Quora

What is the value of tan(x) when x is equal to 90 degrees? - Quora