kevinmwc1 kevinmwc1

Today at 2:38 PM
Mathematics

Answered

In triangle ABC, a = 3, b = 5, and c = 7. Find the approximate value of angle A.

Answer :

amna04352 amna04352

Today at 2:43 PM

Answer:

21.8° (22° to the nearest degree)

Step-by-step explanation:

Using cosine law:

a² = b² + c² - 2bc(cosA)

3² = 5² + 7² - 2(5)(7)cosA

cosA = 13/14

A = 21.7867893

Approximately angle: 22°

Answer Link

Other Questions

What is the key tool for reducing industrial greenhouse gas emissions in the European Union? A. UNFCCC B. ISO C. GHG D. EUETS

What can be determined by converting net income from an accrual basis to a cash basis under either the direct or the indirect method?

A sample of trifluoroacetic acid, C2HF3O2, contains 38.9 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.

When opening a door, you push on it perpendicularly with a force of 55.0 N at a distance of 0.850m from the hinges. What torque are you exerting relative to the

A sample of trifluoroacetic acid, C2HF3O2, contains 38.9 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.

परीक्षा में अच्छे अंक लाने पर अपनी बहन को एक बधाई संदेश भेजिए

Explain the following: (a) Electronegativity of elements increase on moving from left to right in the periodic table. (b) Ionisation enthalpy decrease in a grou

a beaker has 180g of water in it . Number of mole of oxygen atom in it will

tomm is my history exam. im not prepared. some are answers are byhearted some are not. i need some tips. what should i do now? pls help im scared. i need tips o

The nurse is providing discharge teaching about home managem

PLEASE HELP 22 POINTS!!!!!!!!!!! Kyle is purchasing a refurbished phone. He is looking at the phone models 4, 5, and 6, with a protective case in red (R), blue

Lincoln is working two summer jobs, making $13 per hour lifeguarding and $23 per hour tutoring. Last week Lincoln earned a total of $210 and worked 4 times as m

Nancy Stone has a small company and has negotiated a special rate for rental cars when she and other employees take business trips. The maximum charge is $45.00

HELP QUICK PLEASE!!!!!

DNA and RNA are both A-made up of nucleotides and carry molecules from one end of a cell to another B- monomers of protein molecules that provide structure to a

-. Mrs. Jones has a local bakery. Last week this expression shows how many peanut buttercupcakes she baked. 5 (2x-4) + 3(3+4x)irt A: What is the simplified form

craig went out to a restaurant for dinner. he tipped 16% of his bill, which brought the sum of the dinner bill plus the tip to $26.10. how much was the original

How does a team of archaeologists work together to carry out an excavation

What is a mixed number greater than one

How is go math 6.6 helping us