Questions on Trigonometry 28 Aug 2012 (Post Evening)


Question for practice 
The following questions are more helpful for class tenth students for all boards.

Questions 20.  If tanA = 2- root(3), then what is value of tan(90 - A).
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Comments

  1. Ans.
    Tan(90-A) = Cot A
    also, Cot A = 1/ Tan A
    Tan A = 2-root(3)
    so, Cot A = 1/ 2-root(3)
    therefore, Tan(90-A) = 1/ 2-root(3)

    ReplyDelete
  2. tan(90-A)=cotA= 1/tanA
    tan(90-A)= 1/tanA
    tan(90-A)=1/2-root(3)

    ReplyDelete
  3. tan(90-A) = cot A
    cot A = 1/tan A
    therefore, 1/ 2-root(3)
    rationalizing, 1/2-root(3) * 2+root(3)/2+root(3)
    ==> 2+root(3)/4-3
    so . answer = 2+root(3) :P

    ReplyDelete
  4. tan (90-a)=cota
    cota= 1/tana
    =1/2-root 3
    =2-root 3

    ReplyDelete

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