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  1. IloveManUtd94

    Binomial Theorem

    Can someone explain detailedly to me how to solve this: In the expansion of (1 + x)^n , the coefficient of x^5 is the arithmetic mean of the coefficients of x^4 and x^6 . Calculate the possible values of n.
  2. IloveManUtd94

    Proving identities

    I'm really stuck on this. I can't prove this: [cot A / (1- tan A)] + [tan A / (1 - cot A)] = 1 + sec A cosec A
  3. IloveManUtd94

    Trigonometrical ratios and equations

    HELP!! How do I solve for the following for 0º ≤ x ≤ 360º : 3 sin x tan x = 7 THANKS!!
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