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Digiron [165]
3 years ago
14

Solve each equation for 0 degrees < x < 360 degrees.

Mathematics
2 answers:
grigory [225]3 years ago
4 0

Answer:

120 degrees and 330 degrees

Step-by-step explanation:

Solve each equation for 0 degrees < x < 360 degrees.

Sqrt 2 cos x + 1 = 0

A.45,315

B.115,245

C.135,225

D.46, 314

Please Help ASAP!

Given the expression √(2cosx+1) = 0

Square both sides of the equation;

√(2cosx+1) = 0

2cosx + 1 = 0

2cosx = -1

cos x = -1/2

x = cos^-1(-1/2)

x = -60 degrees

Since cos is negative in the 2nd and 3rd quadrant then;

x = 180-60 = 120 degrees (2nd quadrant)

x = 270+60 = 330 degrees (3rd quadrant)

UNO [17]3 years ago
4 0

Answer:It C

Step-by-step explanation:

3pi/4 = 135 , 5pi/4 += 225

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8 0
3 years ago
A) A shopkeeper marks the price of an article R's. 550 and gives the customer discount of 10℅.In this way, he gains Rs 75 on the
kumpel [21]

Answer:

Marked Price =MP=550 Marked Price =MP=550

Selling Price=SP=550-10%=550-55=495Selling Price=SP=550-10%=550-55=495

The profit earned is , SP−Profit=CP(CostPrice)The profit earned is , SP−Profit=CP(CostPrice)

CP=495−75=420CP=495−75=420

The difference of MP and CP is 550−420=130The difference of MP and CP is 550−420=130

 The percentage of difference w.r.t CP is  The percentage of difference w.r.t CP is 

130420×100=30.95%

Step-by-step explanation:

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5 0
3 years ago
Solve the system of equations using elimination/combinations-2x -y = -4 x + 2y =5
sweet-ann [11.9K]

Answer:

x = 1, y = 2

Step-by-step explanation:

In the elimination method to solve a system of linear equations, one of the two equations is added/subtracted to the other, in order to eliminate one variable from the equation.

In this problem, we have the following two equations:

-2x-y=-4\\x+2y=5

To solve the system, first we multiply by 2 both sides of the second equation, and we get:

2(x+2y)=2(5)\\2x+4y=10

So now the system is

-2x-y=-4\\2x+4y=10

Now we add the two equations, and we get:

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So, we get

y=\frac{6}{3}=2

Now we can substitute this value of y into the eq.(2), and we get:

x+2y=5\\x+2(2)=5\\x+4=5\\x=5-4=1

3 0
3 years ago
There's a pair of points (3,5), (x,15) and a slope of 2 how do I find x​
sergeinik [125]

You have the slope and you have two points, so you can use the slope equation to find x.

b=\frac{(y_2-y_1)}{(x_2-x_1)} \\2=\frac{(15-5)}{(x-3)} \\2(x-3)=(15-5)\\2x-6=10\\2x=16\\x=8

So your answer is x = 8.

8 0
3 years ago
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Answer:

Step-by-step explanation:

5 0
3 years ago
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