3 years ago

Product tan1°.tan2°.tan3º......tan89° is:

1 answer:

4 0

$\sin(x) = \cos(90-x) \frac{sin(x)}{cos(90-x)} = 1\\\prod_{n=1}^{89}\tan(n) = \frac{\sin(1)}{\cos(1)} \cdot \frac{sin(2)}{cos(2)}...\frac{sin(89)}{cos(89)} = 1$

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erastovalidia [21]

Answer:

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Usimov [2.4K]

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