kevinmwc1 kevinmwc1
  • 15-04-2020
  • Mathematics
contestada

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

Respuesta :

amna04352
amna04352 amna04352
  • 05-05-2020

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

Otras preguntas

what fraction does the number line show ?
differentiate agricultural waste from hazardous waste.​
ANTONYMSRead each sentence carefully before selecting the correct antonym. 11. The manager decided to inform the staff about all (complaints) received from cust
You bought 6 bars of home made soap from eBay, and weighed them on an electronic scale. They weighed 4.003, 4.006, 4.012, 4.008, 4.004, and 4.009 ounces. What i
The results of a national survey showed that on average, adults sleep hours per night. Suppose that the standard deviation is hours. Round your answers to the n
1. Peter is a little overweight and very self-conscious about it. One day in class another student said to him, "Exercise needs to become his friend. You should
I'm not sure if its A.
What role does the exposition play? it ends the play it builds the climax it gives the character descriptions it sets up the play
The number of miles Cynthia travels each day isshown. What are the values of the measures of center and variability that bestdescribe the data set?57, 40, 35, 6
what is a nucleic acid that contains the genetic information for heredity in most organisms.