Evaluate the expression. Question 9 options: A) tan π∕56 B) tan 17π∕56 C) –tan 17π∕56 D) –tan π∕56

Himanshu Mahajan asked May 10, 2022

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Himanshu Mahajan asked May 10, 2022

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15 votes

Answer:

Explanation:

Note the expansion

tan(a - b) =
(tana-tanb)/(1+tanatanb)

We are given the right side of the expansion , then left side is

tan(
$(\pi )/(7)$ -
$(\pi )/(8)$ )

= tan(
$(8\pi -7\pi )/(56)$ )

= tan (
$(\pi )/(56)$ ) → A

Tomas Lukac answered May 16, 2022

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