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Please help me on this

Please help me on this-example-1
User Dkb
by
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1 Answer

1 vote

Answer: Option B.

Explanation:

You neeed to use the trigonometric identity:


sin\alpha=(opposite)/(hypotenuse)

As you need to find sin∠A, you can identify in the right triangle that:


opposite=8\\hypotenuse=10\\\alpha=A

Finally, substitute the angle, the lenght of the opposite side and the lenght of the hypotenuse into
sin\alpha=(opposite)/(hypotenuse) to find sin∠A. Then, you get:


sinA=(8)/(10)

Reducing the fraction:


sinA=(4)/(5)

This is the option B.

User Tete
by
8.4k points

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