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Answer:
cos(θ) = (√33)/7
Step-by-step explanation:
The relevant relation is ...
cos(θ) = √(1 -sin²(θ))
cos(θ) = √(1 -(4/7)²) = √(1 -16/49) = √(33/49)
cos(θ) = (√33)/7
Solution: Alyssa is incorrect.
In fact
.
If we cross-multiply the above equation, we have:


Therefore, they are equal.
Also, if we reduce the given fractions, we have:

And

Since both the fractions reduced to
, therefore fractions are equivalent.
Answer: c 6
Step-by-step explanation:
3 2/3 +2.3...
2.3....=2 1/3
3 2/3 + 2 1/3= 5 3/2
=6