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3 years ago

If cos ∅ lies in the quadrant IV, what can be the value of cos ∅?

Mathematics

2 answers:

Murljashka [212]3 years ago

3 0

Answer:

3/5

Step-by-step explanation:

The range of the cosine function is [-1, 1]. Since √41/5 is greater than 1, we eliminate answers a) and b) immediately.

If this angle lies in Quadrant IV, the "adjacent side" is positive. Thus, the cosine of this angle must be 3/5.

OlgaM077 [116]3 years ago

3 0

D is the correct answer

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Answer:

$ST = 12$

Step-by-step explanation:

By AA Similarity, triangles ASR and EST are similar.

The ratio of the lengths of the sides of triangle ASR to those of EST is 6/8 or 3/4.

$\dfrac{SR}{ST} = \dfrac{3}{4}$

Also,

$SR + ST = 21$

By a rule of proportions, you get

$\dfrac{SR + ST}{ST} = \dfrac{3 + 4}{4}$

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3 years ago

What is the value of x? Test is timed please help.

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Answer:

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Step-by-step explanation:

A circle has a total of 360 degrees. Because central angles are congruent to the degree measures of their arcs, and because of vertical angles we can construct the equation :

5x+37+5x+37+3x-9-9=360

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2 years ago

A department store buys 200 shirts at a cost of $5,400 and sells them at a selling

jekas [21]

Number of shirts a department store bought = 200

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Which means :

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Since selling price is greater than cost price, there was a markup in the price of the shirts.

We know that :

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