3 years ago

Need help with 55, thanks!

Mathematics

1 answer:

Serhud [2]3 years ago

8 0

I worked it out for you.

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Sin4θ - sin2θ = _____ 2cos3θcosθ 2cos3θsinθ 2sin3θcosθ 2sin3θsinθ

DIA [1.3K]

Answer:

B. 2cos3θsinθ.

Step-by-step explanation:

Use the identity

sin x - sin y = 2 [cos(x + y)/2]sin [x - y)/2].

So we have:

sin4θ - sin2θ = 2 cos (4θ+2θ)/2 sin (4θ-2θ)/2

= 2cos3θsinθ.

5 0

3 years ago

The museum charges $14 for adult admission and $11 for each child. the museum bill for a school field trip was $896.

lord [1]

14x + 11y = 896

x = number of adults
y= number of kids
if nine adults went then 70 kids went

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3 years ago

X-(2x+3) how to solve and why you change the sign for the +3?

alekssr [168]

Answer:

-x - 3

Step-by-step explanation:

x-(2x + 3)

=> x-1(2x + 3)

=> x - 2x - 3

=> -x - 3

Therefore, this is the solution. Hoped this helped.

$GeniusUser$

6 0

3 years ago

Read 2 more answers

A light bulb can be at most 50 watts to be safely used in this light fixture

vagabundo [1.1K]

Somewhat true but I need more information to this problem

8 0

3 years ago

Translate the sentence into an equation.

murzikaleks [220]

Answer:

9 - 5x = 7

Step-by-step explanation:

Nine (9) less (-) then the product (*) of 5*x, equals (=) to 7

9 - 5x = 7

3 0

2 years ago