sarahhmao
02.07.2019 •
Mathematics
Frankie has $40 in his wallet. he decided to buy a pair of earrings for his mom for her birthday. he spent 25% of his money on the earrings. how much were the earrings?
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Ответ:
He spent 10 dollars on them
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)