Find the measure of 63°

Mathematics

2 answers:

Amanda [17]2 years ago

7 0

Answer:

on a number line or using a protractor to get 63 degrees u have to find wee the standard points are. like 90, 180, 260, 380 degrees. then use those to get closer.

Step-by-step explanation:

Hatshy [7]2 years ago

3 0

I don’t know but hopefully you can find someone to answer this

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The angle θ lies in Quadrant II. sinθ=3/4 What is cosθ ?

Elden [556K]

Hello from MrBillDoesMath

Answer:

[email protected] = - sqrt(7)/ 4

which is choice B

Discussion:

This problem can be solved by drawing triangles and looking at ratios of sides or by using the trig identity:

([email protected])^2 + (sin2)^2 = 1

If [email protected] = 3/4 , the

([email protected])^2 + (3/4)^2 = 1 => (subtract (3/4)^2 from both sides)

([email protected])^2 = 1 - (3/4)^2 = 1 - 9/16 = 7/16

So...... taking the square root of both sides gives

[email protected] = +\- sqrt(7)/ sqrt(16) = +\- sqrt(7)/4

But is [email protected] positive or negative? We are told that @ is in the second quadrant and cos(@) is negative in this quadrant, so our answer must be negative

[email protected] = - sqrt(7)/ 4

which is choice B

Thank you,

Mr. B

4 0

3 years ago

The distance between two locations, A and B is calculated using a third location C at a distance of 15 miles from

Rufina [12.5K]

<h3>Answer: approximately 6.3 miles</h3>

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Explanation:

See the diagram below. The two given angles B = 105 and C = 20 are used to help find angle A