Whats his mistake and the correct awnser

Mathematics

1 answer:

HACTEHA [7]3 years ago

8 0

Answer:

θ ≈ 35.7°

Step-by-step explanation:

His mistake was in using the wrong trig. ratio

Instead of using cosine he should have used the sine ratio

sinθ = $\frac{opposite}{hypotenuse}$ = $\frac{7}{12}$ , then

θ = $sin^{-1}$ ( $\frac{7}{12}$ ) ≈ 35.7° ( to the nearest tenth )

You might be interested in

How will the metric system be used in your furture career

Solnce55 [7]

Answer:

i feel as if in the United States, both the metric system and the English system of measurement are used, although the English system predominates. This discussion question has three parts:

Look around you to find something in the U.S. that is measured in metrics. Describe it to the class.

Give an example of how you think the metric system will be used in your future career.

Do you think the U.S. should switch to metric system exclusively? Why or why not?

This week we learned about the metric and U.S. customary measurement systems. Please upload and submit your responses to the following questions in at least 150 words:

In reflecting on both measurement systems, what did you find most important?

Explain how both measurement systems could relate to your life, community, or current/future career.

Expert Answer

Step-by-step explanation:

6 0

3 years ago

Write and simplify an algebraic expression to represent the area of the shaded region. The image is below.

Lena [83]

$(x+2)^2 - 1\cdot(x-5) = x^2 + 2\cdot2x + 2^2 - (x - 5) = x^2 + 4x + 4 - x + 5 = x^2 + 3x + 9$