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2 years ago

Please help me answer this question. I dont understand any of this.. I will mark brainliest.

Mathematics

2 answers:

UkoKoshka [18]2 years ago

7 0

Answer:

A = 77.32

Step-by-step explanation:

Since this is a right triangle we can use trigonometric functions

sin = opposite side/ hypotenuse

sin A = 80/82

sin A =40/41

Take the inverse sin of each side

sin^-1 (sin A ) =sin ^-1 (40/41)

A =77.31961651

Rounding to the nearest hundredth

A = 77.32

defon2 years ago

3 0

Answer:

77.32°

Step-by-step explanation:

Using cosine law:

80² = 18² + 82² - 2(18)(82)cos

cosA = 9/41

A = 77.31961651°

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