3 years ago

Solve the equation: sin(2x)= sin x

Mathematics

1 answer:

Anna [14]3 years ago

3 0

Answer:

Below

Step-by-step explanation:

sin(2x) = 2 ×cos(x)× sin(x)

● sin(x) = 2 × cos(x) × sin(x)

● 2 × cos(x) = 1

● cos (x) = 1/2

So we can deduce that:

● x = Pi/3 + 2*k*Pi

● or x = -Pi/3 + 2*k*Pi

K is an integer

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If y=20 when x=8, whats the value of x when y=-2

lisabon 2012 [21]

Answer:

x=-4/5

Step-by-step explanation:

8/20=x/-2

simplify 8/20 into 2/5

2/5=x/-2

cross product

5*x=-2*2

5x=-4

x=-4/5

8 0

3 years ago

25. Which is an example of an operation? A) 12 B) 6ab C) + D) y

nasty-shy [4]

Letter c is an operation.
Addition

8 0

3 years ago

Fill in the table using this function rule. y = 5x+4

olya-2409 [2.1K]

No idea man

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2 years ago

I have to find the slope for 4. ASAP please help

Lorico [155]

Given:

The objective is to find the slope of the straight line.

Explanation:

The general equation to find the slope is,

$m=\frac{y_2-y_1}{x_2-x_1}$

Let's consider two coordinates from the graph.

$\begin{gathered} (x_1,y_1)=(0,0) \\ (x_2,y_2)=(-1,5) \end{gathered}$

On plugging the values in the equation of slope,

$\begin{gathered} m=\frac{5-0}{-1-0} \\ m=-5 \end{gathered}$

Hence, the slope of the straight line is -5.

3 0

1 year ago

Which statement is true?

Mumz [18]

The answer is D.

|-4| < 4
4 < 4

|-1| < 0
1 < 0

|-6| = -6
6 = -6

|-14| > 10
14 > 10

6 0

2 years ago