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
ira [324]
3 years ago
15

Which expression is equivalent to sin(1.8x) sin(0.5x)?

Mathematics
1 answer:
Rasek [7]3 years ago
3 0
Hum, this problem was difficult. You use the next expression to solve this problem. \[\cos (A - B) = \cos A \cos B + \sin A \sin B \] \[\cos (A + B) = \cos A \cos B - \sin A \sin B\] \[\cos (A - B ) - \cos (A +B ) =2 \sin A \sin B\] So \[\sin A \sin B = 0.5 \left( \cos(A - B) - \cos(A + B) \right)\] A = 1.8 x, B = 0.5 x \[\sin (1.8x) \sin (0.5x) = 0.5\left( \cos(1.8-0.5)x - \cos(1.8+0.5)x \right)\]\[= 0.5 \left( \cos(1.3x) - \cos (2.3x) \right)\] It's finish !!
You might be interested in
Carlos bought 80 feet of wire for ​$17.60. He needs 30 more feet. If the unit price is the​ same, how much will he pay for the e
Alika [10]

Answer:

Carlos bought 80 feet of wire for ​$17.60.

Then the price for 1 feet of wire is 17.6/80 = 0.22

=> 30 feet of wire would cost: 30 x 0.22 = 6.6

Hope this helps!

:)

5 0
2 years ago
What is 66×94÷996-9 Please answer quicly
zhenek [66]

Answer:

I am pretty sure it's −2.7710843373

8 0
3 years ago
Read 2 more answers
Find the value of each variable.
PSYCHO15rus [73]

Answer:

there r no variables shown

Step-by-step explanation:

8 0
2 years ago
I. A school principal wants to offer
GenaCL600 [577]

Answer:

i think c

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
There were 8 students o a field trip. While, outside, 75% of the students wore jackets. How many students wore jackets
Vlad1618 [11]

Answer:

6

Step-by-step explanation:

0.75*8=6

8 0
2 years ago
Other questions:
  • I am so lost right now please help!!!!
    5·1 answer
  • If ƒ(n) = 3n 2 - 7, then ƒ(-2) equals _____.
    10·1 answer
  • Trisha invited 12 friends to her party. Eight of her friends are girls. What is 8 12 in simplest form?
    8·2 answers
  • Any megaminds active right now ???
    6·1 answer
  • There are 3 balls in a hat; one with the number 1 on it, one with the number 6 on it, and one with the number 7 on it. You
    10·1 answer
  • Pls help me ill give brainliest <br><br> Do all 3 pls to get brainliest
    6·1 answer
  • Which is the solution to the equation below? 4n+5=25-3n
    9·2 answers
  • Show 2 + 5 in number line.
    12·2 answers
  • If you can buy 15 bags of potatoes for $20, then how many can you buy with $4?
    6·2 answers
  • Angle Sum Theorem <br> y = ?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!