Question

Enter the expression 2 cos 2(θ)−1, where θ is the lowercase Greek letter theta

Answer 1

@hero

Answer 2

@Australopithecus

Answer 3

Enter it into what?

Answer 4

I have to enter it into a answer box

Answer 5

that expression looks ambiguous,

I would assume it is this?

\[2\cos(2\theta - 1)\]

Not really understanding the purpose of this question

Answer 6

Its just to use explicit expressions

Answer 7

@Australopithecus

Answer 8

can you post a picture of the question? not really sure what it is asking still

Answer 9

Did you get it?

Answer 10

oh yeah what I wrote isn't right

Answer 11

Okay. Can you explain to me what's the right answer?

Answer 12

so they just want you to show that you know how to write:

\[2\cos^2(\theta) - 1\]

Answer 13

From what I understand is this just a tutorial on how to use their mathematics notation software?

Answer 14

Yes

Answer 15

click the buttons above

Answer 16

the square ones

Answer 17

or try

Answer 18

writing,

2cos^2(theta) - 1

you want whats in the box to look identical to whats written next to it

Answer 19

those buttons above should let you insert theta and there should be one that allows you to input exponents just play around with it you will get it

Answer 20

What's theta?

Answer 21

Wait so insert the same thing?

Answer 22

or simply write cos2theta