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3 years ago

13

I need help working question 8. I don't understand how to start it

1 answer:

Lina20 [59]3 years ago

8 0

Why don't you first try to use the cosine law to solve for an angle and then make use of the sin law to solve for the remaining angles.

Cosine law

C^2 = A^2 + B^2 - 2AB(cos C)
Solve for cos C, and then take the inverse of the trig ratio to solve for the angle.

Then set up a proportion like you have done using the sin law and solve for another angle. Knowing the sum of all angles in a triangle add up to 180 degrees, we can easily solve for the remaining angle.

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X + y =7<br>x - y= 1<br><br>find X and Y

Lena [83]

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3 years ago

Read 2 more answers

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Slav-nsk [51]

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3 years ago

Grandma put 1⁄6 teaspoon of pepper into the soup. After tasting the soup, she added 1⁄8 teaspoon of pepper. How much pepper is i

alexandr1967 [171]

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3 years ago

Which of the following could explain the changes in growth between the 15th month and the 24th month ?

noname [10]

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Step-by-step explanation:

i think it's right

6 0

3 years ago

A portion of the graph of f(x) = −x2 − 2x + 8 is shown. Which of the following describes all solutions for f(x)?

Naily [24]

Answer:

$(x,-x^2-2x+8)$ where −5 ≤ x ≤ 3

Step-by-step explanation:

The given function is $f(x)=-x^2-2x+8$ .

We want to select the option that describes all the solutions to the parabola.

The domain of the parabola is −5 ≤ x ≤ 3.

This means that any x=a on −5 ≤ x ≤ 3 that satisfies (a,f(a)), is a solution.

This can be rewritten as $(a,-a^2-2a+8)$

Therefore for x belonging to −5 ≤ x ≤ 3, all solutions are given by:

$(x,-x^2-2x+8)$ where −5 ≤ x ≤ 3.

7 0

3 years ago