Question

Precalculus @Hero

Answer 1

\[1 - \sin^2 x = 0.5 \cos x\]
\[\cos^2 x = 0.5 \cos x\]
\[(\cos x) (\cos x) = 0.5 \cos x\]
\[\cos x = \frac{ 1 }{ 2 }\]
\[x = \frac{ \pi }{ 3 }\]

Answer 2

These cos^2 x always hide a solution, so I know I'm missing something here.

Answer 3

\(\cos^2x - \dfrac{1}{2}\cos(x) = 0\)
\(\cos(x)\left(\cos(x) - \dfrac{1}{2}\right) = 0\)

Answer 4

I think you might know what to do from there

Answer 5

I keep doing these problems linearly.

Answer 6

Like straight algebra

Answer 7

Yeah, it's best to think of these like quadratic equations. Move everything to the left and set equal to zero.

Answer 8

Technically, if you let \(\cos(x) = x\) then you would have:
\(x^2 = 0.5x\)

If you thought of it that way, you would know to automatically move everything to the left side:
\(x^2 - 0.5x = 0\)
\(x(x - 0.5) = 0\)

Becomes more obvious then.

Answer 9

That's true. I think I'll start converting my trig functions to x since they look easier that way.

Answer 10

Thank you again Hero

Answer 11

Yup, it definitely helps.

Answer 12

What is the determinant of the coefficient matrix of this system?
4x-3y=-8
8x-3

Answer 13

Which is the strongest thesis for an essay about volunteering?

Answer 14

When the determinant of the coefficient matrix of a system of equations does not

Answer 15

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Answer 16

A truck travels from a factory to a gas station in 4 minutes. It stops at the gas station for 2 minutes.

Answer 17

If mu2220ABC = 157u00b0 and mu2220DBC = 83u00b0, what is the m u2220ABD in degrees?

https://learning.

Answer 18

This scene depicts the conversation between the man from the West and the other man.

Answer 19

Emilio has created a document in Word and needs to print labels. He is shopping at a store and finds Avery labels and another brand that is less expensive.

Answer 20

ROLEPLAY THREAD

(No arguments about faking and pranking.
Ok thanks)

Answer 21

https://static.k12.com/nextgen_media/assets/1534308-IM1_140919_040801.jpg

Which translation vectors could have been used for the pair of figures?

Select e

Answer 22

Here is a roleplay thread, go wild ;)
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No, do not call the cops on me.

Answer 23

This was an rp thread, oops

Answer 24

Simplify negative 4 over 5 u00f7 3 over negative 2.

negative 8 over 15
negative

Answer 25

What is true about every rotation?

A. The image is smaller than the pre-image.

B.

Answer 26

3p u2013 7 + p = 13

Answer 27

I am doing a project and I was wondering can your heart actually hurt from a brea

Answer 28

Alex is an avid ornithologist and bird-watcher. He received a tweet from a colleague that the "pink-tufted warbler," a rare and exotic bird, was sighted onl

Answer 29

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Answer 30

A dietician ask a patient about the food that the patient eats and makes the tabl

Answer 31

How is this possible?