$\bf \textit{terminal point }\implies 
\begin{array}{lclcll}
(&1&,&-1)\\
&\uparrow &&\uparrow \\
&x&&y
\end{array}
\\\\\\
sin(\theta)=\cfrac{y}{r}
\qquad 
% cosine
cos(\theta)=\cfrac{x}{r}
\qquad 
% tangent
tan(\theta)=\cfrac{y}{x}\\\\
-----------------------------\\\\
\textit{so, what's the radius "r"?}\implies r^2=x^2+y^2\implies r=\sqrt{x^2+y^2}$

3 0

3 years ago

Which pair of variables has a clear causal link between the two named variables?

harina [27]

Answer: The number of air conditioners sold per day in a city and the daily temperature

Step-by-step explanation:

We know that if there is a causal relationship between two variables then one variable is responsible for causing the other variable.

the number of hats sold and the number of mittens sold in a city.

there is no causal relationship between the variables since both are independent variables.

the amount of butter and the amount of bread consumed by a family .

there is no causal relationship between the variables since both are independent variables.

the number of notebooks sold and the number of pens sold in a stationery store .

there is no causal relationship between the variables since both are independent variables.

the number of air conditioners sold per day in a city and the daily temperature .

there can be causal relationship between the variables since by increasing or decreasing temperature the the number of air conditioners sold per day in a city can be increased or decreased respectively.

the number of hours a person can swim and the depth of the pool.

there is no causal relationship between the variables since both are independent variables.

5 0

4 years ago

Read 2 more answers

Al terminar una obra tres albañiles cobran $16800 y se dividen el dinero a razón 5:7:9. Calcular cuánto dinero le corresponde a

NNADVOKAT [17]

Answer:

$4000, $5600 and $7200

Step-by-step explanation:

Let the money be 5x,7x and 9x.

Total collection of money is $16,800

ATQ,

5x+7x+9x=$16,800

21x=$16,800

$x=\dfrac{16800}{21}\\\\x=\$800$

So, the values are :

5x=5(800) = $4000

7x=7(800) = $5600

9x=9(800) = $7200

4 0

4 years ago