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
xeze [42]
3 years ago
6

Simplify the expression by using a double-angle formula. 2 sin 31°cos 31°

Mathematics
1 answer:
qwelly [4]3 years ago
6 0

The double angle formula for the sine is

\sin(2x) = 2\sin(x)\cos(x)

The right hand side is exactly your expression, where x = 31^\circ

So, rewriting the expression from right to left, we have

2\sin(31^\circ)\cos(31^\circ) = \sin(2\cdot 31^\circ) = \sin(61^\circ)

You might be interested in
Solve the problem . (x – 2) = –14(x – 8)<br> 1) x=0<br> 2)x=--5 1/3<br> 3)x=-3 1/5<br> 4)x=3 1/5
Mrrafil [7]

Answer:

x=38/5

Step-by-step explanation:

distribute

Add 2 to both sides of the equation

Simplify

8 0
3 years ago
a doll house has 15.5 square feet downstairs and 6.25 square. feet upstairs. which of the following is the best estimate of the
kiruha [24]

estimating the numbers are 15 and 6 your answer is 90 square feet

7 0
3 years ago
Read 2 more answers
What is 2.368 rounded <br> to the nearest hundredth.
sveticcg [70]

Answer: 2.37

Step-by-step explanation:

8 0
3 years ago
A high school has 44 players on the football team. The summary of the players' weights is given in the box plot. What is the int
lutik1710 [3]

Answer:

Where’s the plot box???

Step-by-step explanation:

???


3 0
3 years ago
Find a polynomial function of degree 3 such that f(10)=17 and the zeros of f are 0, 5 and 8
fomenos

Step-by-step explanation:

Since f(0) = f(5) = f(8) = 0, we have f(x) = Ax(x - 5)(x - 8), where A is a real constant.

We know that f(10) = 17.

=> A(10)(10 - 5)(10 - 8) = 17

=> A(10)(5)(2) = 17

=> 100A = 17, A = 0.17.

Hence the answer is f(x) = 0.17x(x - 5)(x - 8).

3 0
3 years ago
Other questions:
  • Dante has been shopping for a new bike. He found two bikes that he likes equally-one is sold at Mike's Bikes for $300, and the o
    7·1 answer
  • 92542 nearest ten thousand
    13·1 answer
  • In the diagram, which must be true for point D to be an orthocenter? BE, CF, and AG are angle bisectors. BE ⊥ AC, AG ⊥ BC, and C
    9·2 answers
  • What is the opposite of -4 on the number line?
    12·2 answers
  • I need help with Math... again... (Why is it always math?!)
    7·1 answer
  • Log10 (x squared - 4x + 7) = 2
    11·1 answer
  • Which equation represents a line which is perpendicular to the line y=-\frac{1}{8}x+3
    8·1 answer
  • Determine the value of c that will result in a perfect square trinomial. <br> w^2+6w+ c =130+c
    13·1 answer
  • Each container below describes a ratio of flowers.
    5·1 answer
  • -5(2x-3)=-3(4x-11) plz help me with this ty
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!