SOLUTION: prove that: tan(39°)tan(3°)=tan(15°)tan(9°)

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Question 1137918: prove that: tan(39°)tan(3°)=tan(15°)tan(9°)
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

tan%2839%29tan%283%29=tan%2815%29tan%289%29+°
0.809784033195%2A0.052407779283=0.2679491924311227%2A0.15838444+
0.04243898=0.04243898+
The left side 0.04243898 is equal to the right side+0.04243898, which means that the given statement is always true.
answer: proven to be true