First slide

Multiple and sub- multiple Angles

Question

If A,B,C are the roots of $x^{3} + λ x + 1 = 0$ , then $\tan A + \tan B + \tan C =$

Very Easy

A

$\tan A \tan B \tan C$
B

1
C

-1
D

4

Solution

$If A + B + C = 0 ° then \tan A + \tan B + \tan C = \tan A \tan B \tan C$

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