tan (2tan inverse X + cot inverse X) at X=2Find the value,I couldn`t understand the X=2 thing
Aashi , 6 Years ago
Grade 12
Trigonometry> tan (2tan inverse X + cot inverse X) at X...
1 Answers
Arun
Last Activity: 6 Years ago
The question is that we have to find the value of tan( 2tan-1x + cot-1x ) at x = 2.
So, we can rewrite the question as :
tan( tan-1x + tan-1x + cot-1x )
Since we know that tan-1x + cot-1x = 
Therefore, the question now becomes :
tan( + tan-1x )
If you see this looks like tan( a + b ) formula , where a = and b = tan-1x
Therefore, solving using the formula above we will get,
= 
= 0
This is your answer.
Hope this will help you !
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