Question

Verify the identity cot(x-pi/2) = -tan x

Answer 1

please help

Answer 2

cot(-(π/2-x))
right?

Answer 3

no cot(x-pi/2)=-tanx

Answer 4

i took left hand side

Answer 5

explain please

Answer 6

how to get the answer..i don't understand this

Answer 7

cot(x-π/2)=cot(-(π/2-x)=-cot(π/2-x)
right?

Answer 8

yeah what would be the answer

Answer 9

=-tanx=right hand side

Answer 10

so it would be cot(-pi/2-x)

Answer 11

sorry im really bad at math

Answer 12

someone please help

Answer 13

anyone!!!!

Answer 14

x-π/2=-(π/2-x)
right?

Answer 15

why does it equal it can you please explain

Answer 16

a-b=-(b-a)
right?

Answer 17

ok yes

Answer 18

did u really get it?

Answer 19

yes because in each thing a will be pos and b neg right? so that's why they are equal

Answer 20

plase help

Answer 21

please

Answer 22

so why not
x-π/2=-(π/2-x)

Answer 23

awww I get that part

Answer 24

ok very good

Answer 25

do u know
sin(π/2-30)=cos30

Answer 26

yes

Answer 27

ok

Answer 28

which identity would i use:)

Answer 29

cot(π/2-x)= tan x
right?

Answer 30

yes

Answer 31

that true that's an identity i didn't see that..but how would you add the neg

Answer 32

now
sin(-x)=-sin x
right?

Answer 33

yes

Answer 34

tan(-x)=-tan x
right

Answer 35

yes

Answer 36

in similar way
cot(-x)=-cot x
right?

Answer 37

yes

Answer 38

sowe can write
cot(-(π/2-x))=-cot(π/2-x)
right?

Answer 39

yes you can. but since the problem is cot(x-pi/2)....how would I add the neg since I don't think it can be changed to -cot(-x+pi/2) right?

Answer 40

but we can write
cot(x-π/2)=cot(-(π/2-x))
because x-π/2=-(π/2-x)

Answer 41

right?

Answer 42

ohh okay I see.

Answer 43

so would it mean cot(-(pi/2-X) = -cot(pi/2-x)..like you said before

Answer 44

ya u r correct

Answer 45

so -cot(pi/2-x) = -tanx right?

Answer 46

ya

Answer 47

ohh okay, Thank you so much for your help!!

Answer 48

welcome

Answer 49

anyway which grade u r

Answer 50

12 grade

Answer 51

thank you so much again you are truly a life saver

Answer 52

which country?

Answer 53

i wanna solve ur every math if i can collect ur math book