a) Prove the Identity cot 1/2 A - tan 1/2 A = 2cotA b) By choosing a suitable numerical value for A, show that tan15 is a root of the quadratic equations t^2 + 2 sqrt.3t -1 = 0 thanks.
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Let B = A/2
Originally Posted by Oasis1993 a) Prove the Identity cot 1/2 A - tan 1/2 A = 2cotA Originally Posted by Oasis1993 thanks. Hi all
Originally Posted by qmech Let B = A/2 sorry sir i didnt see your solution mrmohamed
Originally Posted by Oasis1993 a) Prove the Identity cot 1/2 A - tan 1/2 A = 2cotA b) By choosing a suitable numerical value for A, show that tan15 is a root of the quadratic equations t^2 + 2 sqrt.3t -1 = 0 thanks. HI (proved) Now , from this identity .. let be t Then by using the quadratic formula
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