shirlyvelarde11 shirlyvelarde11

05-07-2019
Mathematics

contestada

Express cos5mcos(-3m) as a sum or difference.

-1/2cos2m + 1/2cos2m
1/2cos2m - 1/2cos8m
1/2cos8m - 1/2cos2m
1/2cos8m + 1/2cos2m

Respuesta :

jimrgrant1 jimrgrant1

05-07-2019

Answer:

D

Step-by-step explanation:

Using the product to sum formula

• 2cosAcosB = cos(A+B) + cos(A - B)

note that cos(- 3m) = cos 3m, hence

cos5m cos(- 3m)

= cos 5m cos3m ← A = 5m and B = 3m

= [tex]\frac{1}{2}[/tex] ( 5m + 3m) + cos(5m - 3m) ]

= [tex]\frac{1}{2}[/tex] cos 8m + [tex]\frac{1}{2}[/tex] cos 2m

Answer Link

Otras preguntas

For solutions of the same concentration, as acid strength decreases, indicate what happens to the following (increases, decreases or doesn't change).POH

Sort the statements according to whether they are true for mitosis only, meiosis only, both mitosis and meiosis, or neither.1.This occurs in liver cells.2.Somat

Which of the following is correct? Rich consumers are unaffected by prices.a. True, as rich consumers have no concern about prices.b. False, as rich consumers m

£35 in ratio 6 : 1 would be?

Mixing methods-straight dough method/sponge method/batter method/rapid method A) Straight Dough Method - direct mixing of ingredients B) Sponge Method - pre-fe

The abnormal red blood cells seen in pernicious anemia are due to ________. 1) inadequate folate intake. 2) inadequate folate absorption. 3) inadequate B-12 int

The elected executive in a municipality is known as a ______? 1) city council member 2) city manager 3) commissioner 4) mayor

Using VSEPR theory, what are the electron domain geometries of the CO₂ and SO₂ molecules? a) CO₂ - Linear, SO₂ - Bent b) CO₂ - Bent, SO₂ - Linear c) CO₂ - Trigo

Explain why party walls should be "fixed by survey" as opposed to cross-leases that can be "fixed by tape."

Which of the following is the best reducing agent: F₂,H₂,Na,Na⁺,F⁻? Explain. a. F₂is highly electronegative b. H₂readily loses electrons c. Na has a low ionizat

Q&A Education