When a number is added to the set of numbers 7,8,9,12,6,10 and 11, the mean becomes 8. What number was added
1 answer:
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Answer:
68°
Step-by-step explanation:
The mnemonic SOH CAH TOA reminds you that the relation between the angle's adjacent side and the hypotenuse is ...
Cos = Adjacent/Hypotenuse
This means ...
cos(B) = a/c
B = arccos(1/√7) ≈ 68°
