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Someone help me please

Someone help me please-example-1

2 Answers

3 votes

Answer:

Explanation:

look it up help me Simplify 24

− 23

+ (22

).

Responses

A 12

B 44

C 2828

D 6

User DreamBigAlvin
by
8.5k points
2 votes

Answer:

Explanation:

Use law of Cos to solve for angle

Law of Cos:

c² = a² + b² - 2ab cos C

20² = 23² + 19² - 2(23)(19) cos C

400 = 529 + 361 - 874 cos C

400 = 890 - 874 cos C

-490 = -874 cos C

cos C = .5606

C = cos⁻¹ .5606

C = 55.90

Use again to find angle B

b² = a² + c² - 2ac cos B

19² = 23² + 20² - 2(23)(20) cos B

361 = 529 + 400 - 920 cos B

361 = 929 - 920 cos B

-568 = -920 cos B

cos B = .6174

B = cos⁻¹ .6174

B = 51.87

A = 180 - B - C

A= 180 - 51.87 - 55.90

A= 72.23

User Ryan Burke
by
7.9k points

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