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Lelu [443]
3 years ago
13

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

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
6 0

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°

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3 years ago
temperature in Alexandria Kentucky from 45 degrees to 10 degrees in 5 hours what is the average change in temperature per hour
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4 years ago
Use the point and the slope to graph each line. Write the equation of the line. The line passes through point (2,-2) and is para
elixir [45]

Answer:

y= -x

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<u>slope- intercept form</u>

y= mx +c, where m is the slope and c is the y-intercept.

Given that the slope is -1, m= -1.

Substitute m= -1 into the equation:

y= -x +c

To find the value of c, substitute a pair of coordinates into the equation.

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3 years ago
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3 years ago
Find the measure of XCY. PLEASE HELP ME AND SHOW WORK
Dovator [93]

Answer:

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Step-by-step explanation:

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Using this property in the given circle,

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Therefore, measure of angle XCY is 60°.

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3 years ago
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