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
Snezhnost [94]
3 years ago
5

Find the exact values of sin 2θ and cos 2θ for sin θ= 5/11 on the interval 0° ≤ θ ≤ 90°

Mathematics
1 answer:
Natali [406]3 years ago
4 0

Answer:

Below in bold.

Step-by-step explanation:

sin ^2x + cos ^2 x = 1, so

cos^2x = 1 - (5/11)^2 = 96/121

cos x = √96/11

= 4√6/11.

sin 2x = 2 sinx cosx  = 2 * 5/11 * 4√6/11.

= 40√6/121.

cos2x =  2cos^2 x - 1

= 2 * 96/121 - 1

=  192/121 - 121/121

= 71/121.

You might be interested in
Find the distance between the points (9,8) and (–2,–4).
Nat2105 [25]

Answer:

12/11

Step-by-step explanation:

y2-y1/x2-x1

(-4-8)/(-2-9)

6 0
3 years ago
Read 2 more answers
Which statement is true?
dusya [7]

\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}

Actually Welcome to the Concept of the Symmetry,

Option A.) is correct,

=> N has only the Rotational Symmetry.

7 0
3 years ago
To make fruit punch for a party, we need 4 1⁄2 gallons of ginger ale, 1 gallon of strawberry juice, 2 3⁄4 gallons of frozen oran
lina2011 [118]

For this case we convert the mixed numbers to fractions:

4 \frac {1} {2} = \frac {2 * 4 + 1} {2} = \frac {9} {2}\\2 \frac {3} {4} = \frac {4 * 2 + 3} {4} = \frac {11} {4}

Now we add the fractions:

\frac{9} {2}+1+ \frac {11} {4} + \frac {1} {8} =

We find the least common multiple of the denominators. The l.c.m is 8, then we divide by each denominator and multiply the result by each numerator.

\frac {36 + 8 + 22 + 1} {8} =\\\frac {67} {8} =

8,375

Thus, the punch recipe implies 8.375 gallons. If we convert to a mixed number we have:

8 \frac {3} {8} gallons

Answer:

8 \frac {3} {8}gallons

4 0
3 years ago
While driving on the highway, Dave averages 60 miles per hour. In the city, he averages 30 miles per hour. On a trip to his gran
Tasya [4]
Dave arrived to his grandmother's hours in7.75 hours.
7 0
3 years ago
Read 2 more answers
I Only Need #9 Not 10
Minchanka [31]

Answer:

6

Step-by-step explanation:

Remember the last question? to find circumference you have to multiply the diameter by 3.14? well same here except you divide the circumference by 3.14 to get the diameter. so divide 18.84 ÷ 3.14 = 6

~R3V0

d= \frac{C}{\pi }

C = \pi d (pi times d)

5 0
3 years ago
Other questions:
  • Solve k = 1/ 2 mv2 for m
    15·1 answer
  • Need help on this the struggle is real!!!
    10·1 answer
  • What is the equation of the line perpendicular to y=1/2x+6   that passes through the point (4, 1)?
    13·1 answer
  • Suppose you invest $67 a month in an annuity that earns a 3.1% APR,
    14·2 answers
  • Explain how Main Sequence Stars
    5·1 answer
  • If Jan had 10<br> Apples and gave 4 to him, how many apples does Jan have left?
    14·1 answer
  • You're buying the karaoke machine for $79.00 with 6% tax. How much will you<br> pay all together?*
    5·1 answer
  • Help me please someone
    11·1 answer
  • Question 7 of 10
    12·2 answers
  • At a certain restaurant, 8 sandwiches and 10 burritos will cost $123.40. In addition, 5 sandwiches
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!