Question

tan(x−π/2)∗cos(3π/2+x)−sin^3(7π/2−x)/cos(x−π/2)∗tan(3π/2=x)

Answer 1

plseee solve...

Answer 2

Is it multiple choice?

Answer 3

yaa i wll give you the options

Answer 4

a.(1+cos^2x)
sin^2x
-(1+cos^2x)
cos^2x

Answer 5

@studying?
plsee reply

Answer 6

@Studying?
plsee reply

Answer 7

you are familiar with the 2 formulas I hope.

1) \(\large\color{black}{ \bf Tan(c)= \frac{Sin(C)}{Cos(c)} }\) and

\(\large\color{black}{ \bf Sin (A+\frac{π}{2}) =Cos(A )}\)

Answer 8

yes

Answer 9

but then what to do
@SolomonZelman

Answer 10

then?

Answer 11

the solution for the question

Answer 12

You can do it if you also know that

Cos(A±180)=Cos(180)Cos(A) ∓ Sin(180)(Sin(A) = Cos(A) ( since Sin(180)= 0 )

And you also know that
Cos(A±360)=Cos(360)Cos(A) ∓ Sin(360)(Sin(A) = Cos(A) (since Sin (360) = 0 )

Answer 13

i know the 1st one but not the 2nd one

Answer 14

You have to understand also that π=180 degree. (You don't need to convert though) You just need to understand the general A and (A+180) and (A+360) and other relations to each other.

Answer 15

The first one, you mean the tan=sin/cos rule ?

Answer 16

noo..the first means cosa+-360

Answer 17

but do you understand the rules I am posting ?

Answer 18

yaaa

Answer 19

So what's the problem then? (your score is orange, so I will assume that you are new to this website, but the way it operates, or at least this is the way it should operate; is that the person who answers gives tips and hints (rule or identities) and the ask does the work.)

Answer 20

see
@SolomonZelman
i just want you to show me a solution just like you have given in help

Answer 21

First of all, didn't show the solution, that was a hint. Second of all, the asker in that question apparently has no clue about what I said.

Answer 22

I was suspended 3 times and warned a million for posting the solution and doing asker's work. If you really want, you can take it as that I don't know it and just can't do it....