1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kisachek [45]
3 years ago
9

If sinθ= 4/5 in quadrant II, what is cosθ?

Mathematics
2 answers:
AURORKA [14]3 years ago
7 0

Answer:

cos theta = -3/5

Step-by-step explanation:

jok3333 [9.3K]3 years ago
5 0

Answer:  cos\theta=-\dfrac{3}{5}

<u>Step-by-step explanation:</u>

sin\theta = \dfrac{y}{r}=\dfrac{4}{5}

<u>Step 1:</u>  Use Pythagorean Theorem: x² + y² = r²  to find the x-value

x² + 4² = 5²

x² + 16 = 25

      x² = 9

       x = 3

<u>Step 2:</u> Use the Quadrant to determine the sign of the x-value

                 Quadrant II                          Quadrant I

                     (--, +)                                     (+, +)

                 Quadrant III                          Quadrant IV

                     (--, --)                                     (+, --)

<em>x is negative in Quadrant II</em>

cos\theta=\dfrac{x}{r}=\large\boxed{-\dfrac{3}{5}}

You might be interested in
3 over 18 as a percent please help
Ratling [72]
3/8 as a percentage is 37.5%
3 0
3 years ago
Read 2 more answers
Order the numbers from least to greatest
dusya [7]
Order what numbers from least to greatest
7 0
3 years ago
Which is the correct label of the parallel lines? (4 points) Parallel lines a and b are shown. Points A and B lie on line a whil
ddd [48]
The same way you number
5 0
2 years ago
Find the value of Q3 for the following data set. 3 5 6 6 8 9 9 9 10 10 11
miv72 [106K]
The answer would be C. 10
6 0
3 years ago
Read 2 more answers
15 Points!! Please help and explain how to solve them!! I really want to understand it
babymother [125]
1) idk I got none of your options
2)p=42,000÷(1+0.0225÷12)^(12×5)
P=37,535.04
3)PVAO=4900*12[(1/0.029)-(1/0.029*(1+0.029)^10]=504145.41..compare with 500000
So the answer is D
4)lucas
90×87.92=7,912.8
((8,476.20−7,912.8)
÷7,912.8)×100=7.1%
Peton
55×72.03=3,961.65
((4,192.10−3,961.65)
÷3,961.65)×100=5.8%
So the answer is D
8 0
3 years ago
Other questions:
  • Yusef earned a 25% tip on a meal that cost $75.77. What was the tip amount?
    8·2 answers
  • Can you simplify 37/42
    8·2 answers
  • What is -6x-12+8y+16x simplified? and -4+5x-17-22x simplified?
    10·2 answers
  • What is the price per pound of salt if 1/4 pound cost $0.50
    11·1 answer
  • Can anyone help me with this question??
    7·1 answer
  • Estimate the sum of 4.27 and 9.91 by first rounding each number to the nearest whole number.
    9·1 answer
  • In order to get a certain shade of blue paint, a mixer must have 5 parts white paint to 3 parts blue. If 4 gallons of paint must
    12·2 answers
  • -3 (3c + 5) = 2 (10 - c)
    13·1 answer
  • A computer store buys a computer system at a cost of ​$572.40. The selling price was first at $954​, but then the store advertis
    8·1 answer
  • Referring to the figure, find the area of the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!