All categories

3 years ago

Which is equal to the cosine of

Mathematics

1 answer:

DIA [1.3K]3 years ago

5 0

Answer:

0.8

Step-by-step explanation:

The following data were obtained from the question:

Opposite = 3

Adjacent = 4

Hypothenus = 5

Cos R =?

Cosine R can be obtained by using the cosine ratio as illustrated below:

Cos R = Adjacent / Hypothenus

Cos R = 4/5

Cos R = 0.8

Thus, cosine R is equal to 0.8

You might be interested in

Solve for X and solve for Y?

Llana [10]

Answer:

$x=3\sqrt 5\\$

$y = \sqrt {126}$

Step-by-step explanation:

By geometric mean property:

$x = \sqrt{9 \times 5} = \sqrt{45} = 3 \sqrt{5} \\ \\ by \: pythagoras \: theorem \\ \\ {y}^{2} = {9}^{2} + {x}^{2} \\ \\ {y}^{2} = {9}^{2} + {(3 \sqrt{5}) }^{2} \\ \\ {y}^{2} = 81 + 45 \\ \\ {y}^{2} = 126 \\ \\ y = \sqrt{126}$

7 0

3 years ago

What is the slope of a line that is perpendicular to the line x = –3? –3 0 1/3 undefined

Elena L [17]

Answer:

slope = 0

Step-by-step explanation:

The line with equation x = - 3 is a vertical line parallel to the y- axis

A perpendicular line is therefore a horizontal line parallel to the x- axis

The slope of the x- axis is zero, hence the slope of the horizontal line is

slope = 0

8 0

3 years ago

There are 70 students in the school band. 40% of them are sixth graders, 20% are seventh graders, and the rest are eighth grader

8090 [49]

Answer:

40%

Step-by-step explanation:

40% of 70 is 28

20% of 70 is 14

so there are 28 8th graders 28 is 40% of 70

Also, #SPEEDRUN

8 0

3 years ago

Read 2 more answers

A regular hexagon has sides of 3 feet. What is the area of the hexagon?

frosja888 [35]

Answer:

$13.5\sqrt{3}\:\text{ft}^{2}$

Step-by-step explanation:

Given: The side of a regular hexagon is 3 feet.

To find: Area of the hexagon

Solution:

It is given that the side of a regular hexagon is 3 feet.

We know that the area of a regular hexagon whose side is a units is $\frac{3\sqrt{3} }{2} a^{2}$

Here, the side is 3 feet

So, area of the regular hexagon

$=\frac{3\sqrt{3} }{2} \times3^{2}$

$=\frac{3\sqrt{3} }{2} \times9$

$=\frac{27\sqrt{3} }{2}$

$=13.5\sqrt{3}\:\text{ft}^{2}$

Hence, area of the regular hexagon is $13.5\sqrt{3}\:\text{ft}^{2}$

6 0

3 years ago

3x and 2 are each a(n) ___ in the expression 3x + 2 and the equation 3x + 2 = 8

Amanda [17]

Answer:

The answer is term

Step-by-step explanation:

Glad i could help

5 0

3 years ago