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2 years ago

1+sin^2 x = 2-cos^2 x

Mathematics

1 answer:

Alinara [238K]2 years ago

3 0

1+sin²x=2-cos²x
Remenber: sin²x+cos²x=1 ⇒sin²x=1-cos²x

1+sin²x=1+(1-cos²x)=2-cos² x (this is true)

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When finding the slope of a line using a slope triangle, the____

Elenna [48]

Answer:

rise, run

Step-by-step explanation:

When finding the slope of a line using a slope triangle, the RISE length is divided by the RUN length. (I think. Sometimes the "divided by" makes me confused about which is on top, but I'm pretty sure this is right.)

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2 years ago

I really don't get what the top box is asking me what to do

Kay [80]

Answer:

See below

Step-by-step explanation:

The circle has a circumference:

C = 2πr

This the is arc of full length θ = 360°

Each degree of arc length is:

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2 years ago

Find two positive real numbers whose product is a maximum. the sum is 80

Eduardwww [97]

Let's say the numbers are "a" and "b"

thus $\bf y=ab\qquad 
\begin{cases}
a+b=80\\
b=80-a
\end{cases}\implies y=a(80-a)\implies y=80a-a^2\\\\
-----------------------------\\\\
\cfrac{dy}{da}=80-2a$

set the derivative to 0, and check the critical points, there's only one anyway

and do a first-derivative test, to see if it's a maximum

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3 years ago

Read 2 more answers

PLZ HELP AND SHOW YOUR WORK <3333 Substitution. 3x+2y=11 y=5x-1

liraira [26]

Hey there! :D

Substitute y for 5x-1.

3x+2y=11

y=5x-1

3x+2(5x-1)=11

3x+10x-2=11

13x-2=11

13x=13

x=1

Now, plug that in to find y.

y=5x-1

y=5(1)-1

y=5-1

y=4

(1,4) <== the solution

I hope this helps!
~kaikers

8 0

3 years ago

Monica estimates the recipe makes about 5 cups of fruit salad. Which explanation describes whether Monica's estimate is reasonab

Darya [45]

Answer:

Step-by-step explanation:

Not reasonable, Why did you put that as your answer?

The whole numbers add up to more then 4 cups.

5 0

3 years ago