Answer:
Option A 
Step-by-step explanation:
we know that

Solve for sin(A)

we have


substitute


Step-by-step explanation:



Option D
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Answer:
1
Step-by-step explanation:
To add fractions, we need to make the denominators the same. Luckily, we can simplify 2/10 to 1/5. Now that the denominators are both 5, we can add. When adding fractions, we only add the numerator, and the denominator remains the same, so we'd do 4+1/5, which equals 5/5, which simplifies to 1.
Answer:
A. 312
Step-by-step explanation:
I answered this on another post