All categories

2 years ago

If sin is 3/4 and tan is -3/4, then cos is ?

Mathematics

1 answer:

nadya68 [22]2 years ago

3 0

Answer:

$cos=1$

Step-by-step explanation:

Use the acronym SOH-CAH-TOA

sin = $\frac{3}{4}$

So opposite is 3 and hypotenuse is 4.

tan = $\frac{-3}{4}$

So opposite is -3 and adjacent is 4.

cos = adjacent/hypotenuse

cos = $\frac{4}{4}=1$

You might be interested in

Write the equation in standard form. Identity the center and radius.<br> x² + y2 + 8x-4y-7=0

lorasvet [3.4K]

Answer:

equation;

$(x + 4) {}^{2} + (y - 2) {}^{2} = 27$

Center (-4,2)

Radius is

$3 \sqrt{3}$

Step-by-step explanation:

Since the x^2 and y^2 have the same coeffiecent this will be a circle in a form of

$(x - h) {}^{2} + (y - k) {}^{2} = {r}^{2}$

Where (h,k) is center

r is the radius

So first we group like Terms together

${x}^{2} + 8x + {y}^{2} - 4y - 7 = 0$

Add 7 to both sides

${x}^{2} + 8x + {y}^{2} - 4y = 7$

$( {x}^{2} + 8x) +( {y}^{2} - 4y) = 7$

Since the orginal form of the equation of the circle has a perfect square we need to complete the square for each problem

$(\frac{8}{2} ) {}^{2} = 16$

and

$( - \frac{4}{2} ) {}^{2} = 4$

so we have

${x}^{2} + 8x + 16 + {y}^{2} - 4y + 4y = 7 + 16 + 4$

${x}^{2} + 8x + 16 + {y}^{2} - 4y + 4y = 27$

$(x + 4) {}^{2} + (y - 2) {}^{2} = 27$

To find our center, h is -4 and k is 2

so the center is (-4,2)

The radius is

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

So the radius is 3 times sqr root of 3.

8 0

1 year ago

I'm so d*mb‍ i need help i got the answer but i need help with the formulas and showing my work to get the answer

bazaltina [42]

Answer:youre not dum :)

Step-by-step explanation: e

5 0

1 month ago

All of the following are examples of repeating decimal numbers except _____.

Bess [88]

I think it’s 0.141 same

4 0

2 years ago

Read 2 more answers

You are told to you will have to wait 5 hours in a line with a group of other people. Determine it. 1.You know the number of min

gulaghasi [49]

Answer:

$for\ five\ hours = 300\ min$

Step-by-step explanation:

Given:

Waiting time = 5 hours.

We need to find the number of minutes for 5 hours.

Solution:

We know that 60 minutes for each hour, so one hour is equal to 60 minutes.

For one hour = $60\ minutes$

For five hours = $5\times 60$

$for\ five\ hours = 300\ min$

Therefore, you will have to wait 300 minutes in a line.

3 0

2 years ago

HELP PLS I WILL MARK BRAINLIEST, DUE TODAYY 100 POINTS!!!!!!!!!

Flauer [41]

Answer:

Y1 intercept = 2

(0,2) (3,-7)

m= (-7 - 2) / (3-0) =-9/3 = - 3

Then y = - 3x + 2

Y2 intercept = - 8

(0,-8) (3,-7)

m = (-7 - - 8) / (3-0) = 1/3

Then y= (1/3)x-8

5 0

2 years ago