All categories

3 years ago

Please help!

1 answer:

4 0

$x = r cos \theta \\ \\ y = r sin \theta$

$x = (-2) cos (\pi/3) = (-2)(\frac{1}{2}) =-1 \\ \\ y=(-2) sin (\pi/3) = (-2)(\frac{\sqrt{3}}{2})=-\sqrt{3}$

The rectangular coordinates are:
$(-1,-\sqrt{3})$

You might be interested in

Quadratic Equation

Natasha_Volkova [10]

Step-by-step explanation:

The sum of ages of two friends is 13 years.

The product of their ages is 42.

Let the age of 1st friend and 2nd friend is x, y respectively.

1 st condition= The sum of ages of two friends is 13 yrs.

i.e x+y = 13........ (I)

2nd condition= The product of their ages is 42.

i.e X*y = 42........(ii)

From equation (I)

X+y = 13

or, X = 13-y........ (iii)

Putting the equation (iii) in equation (ii).

X*y= 42

(13-y) * y = 42

13y - y^2 = 42

${y}^{2} - 13y + 42 = 0$

${y}^{2} - (7 + 6)y + 42= 0$

${y}^{2} - 7y - 6y + 42 = 0$

$y(y - 7) - 6(y - 7) = 0$

$(y - 6) (y - 7) = 0$

Either; y-6 = 0

y = 6

Or;

y-7=0

y = 7

Keeping the value of y as "7" in equation (ii)

x*y = 42

7x = 42

X = 42/7

Therefore, the value of X is 6.

Therefore, either 1st friend is 6 years and 2nd is 7 years.

Hope it helps...

7 0

3 years ago

What is the angle of 1,2,3, and 4?

Kisachek [45]

Answer:

1=72

2=36

3=36

4=54

4 0

3 years ago

Michael is 3 times as old as Brandon. 18 years ago, Michael was 9 times as old as Brandon.

Zigmanuir [339]

I hope this helps you

Brandon x

Michael 3x

18 years ago

Brandon x-18

Michael 3x-18

9 (x-18)=3x-18

9x-9.18=3x-18

9x-3x=9.18-18

6x=8.18

x=8.3

x= 24

5 0

3 years ago

Daphne rolls two 6-sided number cubes. What is the probability that she rolls

Alex Ar [27]

The answer is A. 2/36 or 1/18

7 0

3 years ago

Read 2 more answers

Alesha is inviting 10 friends to a party, and each friend will get 5 cookies. How many cookies does Alesha need to get

Montano1993 [528]

Answer:

Step-by-step explanation: