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Grade 11Trigonometry

If tanA ,tanB,tanC are in HP. Then a^2,b^2,c^2 are in

Profile image of Nitya
9 Years agoGrade 11
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2 Answers

Profile image of Nishant Vora
9 Years ago
tanA ,tanB,tanC are in HP

we know thattanA = \frac{\Delta }{s(s-a)}

hence s(s-a)/ deltas(s-b)/ delta,s(s-c)/ delta are in AP

hence a,b ,c are in AP
Profile image of mycroft holmes
9 Years ago
@Nishant Vora: the formula is \tan \frac{A}{2} = \frac{\Delta}{s(s-a)}

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