Question

Need Help!

Answer 1

A
you'd want to multiply by 1- sec x to get 1-sec^2 x in the bottom, which than equals
-tan^2x based on pythagorean identities

Answer 2

tan^2 x + sec^2 x = 1

Answer 3

*tan^2x

Answer 4

Can you help me with one more?

Answer 5

Sure

Answer 6

True or False?

Answer 7

What do you think ?

Answer 8

I think false.

Answer 9

yes it's false

Answer 10

Identity equations are true no matter what value it is plugged in.

Answer 11

Can you help me with another question?

Answer 12

yes sure

Answer 13

Which of the following equations are identities? Check all that apply.
A. cot2x + csc2x = 1
B. sin2x - cos2x = 1
C. sin2x = 1 - cos2x
D. tan2x = sec2x - 1

Answer 14

1+cot^2 x = csc^2x
sin^2x + cos^2x = 1
1 + tan^2x = sec^2 x
those are the 3 trig identities. Can you eliminate some answers?

Answer 15

Wait C and D?

Answer 16

Yes those are correct! :)

Answer 17

Wow can you help me with another?

Answer 18

yes sure

Answer 19

The expression cosx + tanx sinx can be simplified to _____.
A. cscx
B. secx
C. cotx
D. cosx sinx

Answer 20

hint:
\[\tan x = \frac{ \sin x }{ \cos x}\]

So if you have
\[\cos x + \frac{ \sin x }{ \cos x } (sinx)\]

Now you have :
\[\cos x + \frac{ \sin ^{2} x}{ \cos x }\]

Can you continue the problem? Lemme know if you need more hints

Answer 21

Would it be B?

Answer 22

Yes!

Answer 23

Wow haha, can you help me with another one?

Answer 24

Sure

Answer 25

csc x = 1/sinx
sec x = 1/cos x
tan x = 1/cot x
cot x = 1/ tan x
Eliminate some answers?

Answer 26

cot = 1 / tan
since tan = sin/cos
cot = cos /sin

Answer 27

would csc x=1/sinx be correct?

Answer 28

yes

Answer 29

And tan=sin/cos the other?

Answer 30

Yes, tan = sin/cos

Answer 31

So what would that translate to in answers?

Answer 32

Answer is C and D
c. cot = cos / sin
because tan = sin/cos , and cot = 1/tan
then cot = 1/ (sin/cos), which just means you flip the fraction. Thus,
cot = cos /sin, check!

d. tan = 1/cot

Answer 33

do you get d?

Answer 34

yeah, can you help me with another

Answer 35

one?

Answer 36

yes

Answer 37

All identities are equations, and all equations are identities. True or False?

Answer 38

remember that sin x = pi is not an identity , but it is an equation. So what do you think the answer is?

Answer 39

False! Can you help me with another one?

Answer 40

Yes and yes :)

Answer 41

Yes, according to the cofunction identities, memorizing them would be faster.

Answer 42

true that is

Answer 43

Wow, can you help me with another one I'm learning better with you than with teacher

Answer 44

sure, and I'm no where as good haha. Just 1 on 1 is easier to communicate :)

Answer 45

When do you get on? Thank you so much I have to leave, but will get on in one hour.

Answer 46

are you allowed to use calculator?
and I get on around 1- 4:30 pm in California time. pacific coast

Answer 47

Lemme know if you need the next hint