Answer:
1. B)

2. A)

Explanation:
1) Apply the trigonometric ratio tangent.

↓ plugging in the given values

↓ multiplying both sides by 8 to isolate x

↓ plugging the left side into a calculator
B)

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2) Apply the trigonometric ratio sine.

↓ plugging in the given values

↓ multiplying both sides by 7 to isolate x

↓ plugging the left side into a calculator
A)
