Find The Value of tan4° tan43° tan47° tan86°

Find the value of
tan4° tan43° tan47° tan86°

  1. 1/2
  2.  2/3
  3.  2
  4.  1
Anurag Mishra Professor Asked on 12th August 2015 in Maths.
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1 Answer(s)
Best answer

Answer: (4) 1

Explanation:-
tan 4o° tan 43° tan 47° tan 86°
tan (90 – 86)o tan(90 – 47)o tan 47o tan 86o
= cot 86o cot 47o tan 47o tan 86o
= tan 47o tan 86o / tan 86o tan 47o
= 1

Hence, the answer is (4) 1.

Anurag Mishra Professor Answered on 13th August 2015.
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