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Novosadov [1.4K]
3 years ago
15

19. Use the unit circle to find the value of tan 315º. Show work pls.

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
7 0

Answer: -1

Step-by-step explanation:

First change tan(315) to:

\frac{\sin(315)}{\cos(315)}

Then evaluate the sine and cosine function. What is the y component of 315 degrees? What is the x component of 315 degrees?

-\frac{\sqrt{2} }{2} /\frac{\sqrt{2} }{2} =-1

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Across which axis was point A reflected​
Snezhnost [94]

Answer:

When point A with coordinates (0, -1) is reflected across the x-axis and mapped onto point A', the coordinates of A' will be (0, 1).

i.e A'(0, 1) is the image of point A after a reflection.

Hence, point A is reflected across the x-axis.

Step-by-step explanation:

When we reflect a point A across the x-axis, the value of 'y' gets negated, but the value of 'x' remains unchanged.

In other words, when point P with coordinates (x, y) is reflected across the x-axis and mapped onto point P', the coordinates of P' will be (x, -y).

Thus, the rule is:

P(x, y) → P'(x, -y)

Thus, when point A with coordinates (0, -1) is reflected across the x-axis and mapped onto point A', the coordinates of A' will be (0, 1).

i.e A'(0, 1) is the image of point A after a reflection.

Hence, point A is reflected across the x-axis.

4 0
2 years ago
Sasha wants to buy some dresses over the Internet. Each dress costs $7.15 and has a shipping cost of $9.95 per order. If Sasha w
Mars2501 [29]
The inequality that shows the maximum number of dresses she can buy is $7.15p+$9.95=$60 the maximum # of dresses she can buy is 7
3 0
2 years ago
Read 2 more answers
The length of a rectangular garden is 9 feet longer than its width. if the garden's perimeter is 190 feet, what is the area of t
bagirrra123 [75]
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draw a picture and create a formula.
7 0
3 years ago
Helen Ming receives a travel allowance of $220 each from her company for time away from home. If this allowance in taxable and s
m_a_m_a [10]

Answer:

$33

Step-by-step explanation:

From the question, $22 is correct

If Helen Ming receives travel allowance of $220 from her company for time away from home

She has a 10% income tax rate

The amount she has to pay in taxes for the employee benefits is

10% of $220

10/100*$220

=0.1*$220

=$22

So you are correct

The only reason why you could be wrong is if the question is different from what you posted above just like the below question

Helen Ming receives a travel allowance of $220 each week from her company for time away from home. If this allowance is taxable and she has a 15 percent income tax rate, what amount will she have to pay in taxes for this employee benefit?

Here the amount she has to pay for the employee benefits is

15% of $220

15/100*$220

=0.15*$220

=$33

8 0
3 years ago
Can u solve it i dunno how:)​
pshichka [43]

Answer:

Step-by-step explanation

I think it is $170 a month.

Is subtracted 8,500-6,460 and that gave me 2,040.

I divided that by 12 and it gave me 170

6 0
2 years ago
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