megamorph
04.10.2020 •
Mathematics
HELP ASAP PLEASE
Which of the following is equivalent to tan(5pi/6)?
A) tan(7pi/6)
B) cot(5pi/6)
C) tan(-pi/6
D) tan(-5pi/6
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Ответ:
D. tan(-π/6)
Step-by-step explanation:
The tangent function is periodic with a period of π, so ...
tan(5π/6) = tan(5π/6 ± kπ) . . . for any integer k
For k = -1, we have ...
tan(5π/6) = tan(5π/6 -π) = tan(-π/6)
Ответ:
We can remove the parentheses:
7a + 9 + 4a - 7
Now simplify!
7a + 4a + 9 - 7
11a + 2