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3 years ago

If sinA÷2 =4÷2 find the value of cosA (not by pythagoras theorem)

Mathematics

1 answer:

Grace [21]3 years ago

6 0

Answer:

Step-by-step explanation:

Sin A ÷ 2 = 2

Sin A = 2×2

Sin A = 4

Cos A = sqrt (1 - Sin ^2 A) = sqrt(1 - 4^2)

Cos A = sqrt(1-16) = sqrt (-15) = sqrt(15i^2)

Cos A = i sqrt(15)

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Naomi surveyed 480 of the students in her school about their favorite color. 95% said their favorite color was red. How many stu

vichka [17]

Answer:

Step-by-step explanation:

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3 years ago

Consider the function represented by the equation 6q = 3s - 9. Write the equation in function notation, where q is the independe

serg [7]

Answer:

s = 2q + 3

Step-by-step explanation:

A linear function has the form:

● y = mx + b

● y is the output of the function

● x is the variabke that we input

● b is the y-intetcept.

Focus on y and x.

Notice that y depends of the value of x. The value of y changes by changing x. So the value of x controls the output y.

y is dependent but x is not.

■■■■■■■■■■■■■■■■■■■■■■■■■■

● 6q = 3s - 9

We want q to be the independent variable wich means that q will be the input. Therefore s should be the output.

The strategy we are going to follow is separating s in one side alone.

● 6q = 3s - 9

Add 9 to both sides

● 6q + 9 = 3s -9 + 9

● 6q + 9 = 3s

Divide both sides by 3

● (6q + 9)/3 = (3s)/3

● (6q)/3 + 9/3 = s

● s = 2q + 3

So the answer is s = 2q + 3

6 0

3 years ago

Using the figure below identify 1 pair of the following angle relationships

tangare [24]

$\\1) \: \: \underline{ \sf{ Alternate \: interior \: angles \: \: : }}\\$

$\sf \implies \: 2\: \: and \: \: 7\\$

$\sf \implies \: 6\: \: and \: \: 3\\\\$

$\\2) \: \: \underline{ \sf{ Alternate \: interior \: angles \: \: : }}\\\\$

$\sf \implies \: 1\: \: and \: \: 8\\$

$\sf \implies \: 5\: \: and \: \: 4\\\\$

$\\3) \: \: \underline{ \sf{ Corresponding \: angles \: \: : }}\\$

$\sf \implies \: 3\: \: and \: \: 1\\$

$\sf \implies \: 5\: \: and \: \: 7\\$

$\sf \implies \: 4\: \: and \: \: 2\\$

$\sf \implies \: 6\: \: and \: \: 8\\\\$

$\\4) \: \: \underline{ \sf{ Consecutive\: Interior \: angles \: \: : }}\\$

$\sf \implies \: 2\: \: and \: \: 3\\$

$\sf \implies \: 6\: \: and \: \: 7\\\\$

$\\5) \: \: \underline{ \sf{ Consecutive\: Exterior \: angles \: \: : }}\\$

$\sf \implies \: 1\: \: and \: \: 4\\$

$\sf \implies \: 5\: \: and \: \: 8\\\\$

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1 year ago

Need help with middle two questions... I’ll give points

nignag [31]

Answer:

ok sorry i could not put this into a formula im have to go but i will show you a really easy way.

Step-by-step explanation:

for number 1 i got (7,-1)

This is because there is a slope of 1/1 between these two points. so i plotted the two points on the graph. The distance between the two points is 4. so i followed the slope 4 times and thats what i got.

The correct way for doing number 1 is using the distance formula i believe but im running out of time

for the second one i got (3, -1/2)

we do this by using the midpoint formula.

The first picture is for number one and the second for number 2

if you have any questions feel free to ask in the comments

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3 years ago

Lines K and N are perpendicular If the slope of line K is -6, what is the slope of Line N

djverab [1.8K]

line N has slope m = $\frac{1}{6}$

given a line with slope m then the slope of a line perpendicular to it is

$m_{perpendicular}$ = - $\frac{1}{m}$

thus line N has slope - $\frac{1}{- 6}$ = $\frac{1}{6}$

6 0

3 years ago

If sinA÷2 =4÷2 find the value of cosA (not by pythagoras theorem)​

If sinA÷2 =4÷2 find the value of cosA (not by pythagoras theorem)