2 years ago

Given that sinθ=-3/4 in quadrant 4 find cosθ

Mathematics

1 answer:

Gekata [30.6K]2 years ago

4 0

Step-by-step explanation:

sin∅=-3/4 in 4 quadrant which sine is negative there

using soh cah toa

sin=opp/hyp

where our opp=-3 and our hyp=4

using pythagoras theorem

hyp²=opp²+adj²

(4)²=(-3)²+adj²

16=9+adj²

16-9=adj²

adj²=7

adj=√7

from soh cah toa

cos∅=adj/hyp

cos∅=√7/4

You might be interested in

Which are steps in the process of completing the square used to solve the equation 3 – 4x = 5x2 – 14x? Check all that apply.

avanturin [10]

Add 4x over to 14x, 3=5x2- 18x then add 18x to the other side 3+ 18x= 5x2then divided each side by 5,( 3+18x/5=x2) then square root each side the answer to x would be the square root of 3+18x/5

6 0

3 years ago

Read 2 more answers

Which equation represents a line which is parallel to the line x+4y=-20x+4y=−20?

g100num [7]

Answer:

y=7x+3, y=7x−6

7 0

3 years ago

Amelia uses 66 patches of fabric per square foot to make a blanket. How many patches of fabric will she need to make a blanket t

poizon [28]

The answer is 10920. 720720/66=10920

3 0

3 years ago

Help pleaseeeeeeeeee

harkovskaia [24]

97+x=27+64
x=27+64-97
x=-6

(Hopefully this is correct)

4 0

2 years ago

The volume of a cylinder of radius r and height h is given by V = π r 2 h. Then the height, in terms of the radius and volume, i

sdas [7]

Hello There!

It is represented as: h = $\frac{v }{ \pi r^{2} }$

Hope This Helps You!
Good Luck :)

- Hannah ❤

5 0

3 years ago

Read 2 more answers