anonymous
  • anonymous
Verify the identity. cotx minus pi divided by two. = -tan x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Is the identity pi/2?
David27
  • David27
@iloveyou;*
anonymous
  • anonymous
i suck at math sorry :/

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More answers

anonymous
  • anonymous
@Haseeb96
Haseeb96
  • Haseeb96
sorry i also dont know
Haseeb96
  • Haseeb96
@Nnesha
anonymous
  • anonymous
I want to believe the identity is pi/2.
David27
  • David27
@dan815
David27
  • David27
@ganeshie8
Nnesha
  • Nnesha
verify. you need to prove that both sides are equal
Haseeb96
  • Haseeb96
yes
Haseeb96
  • Haseeb96
i have sucked that how to do verify it @Nnesha
Nnesha
  • Nnesha
remember tan =sin /cos so you can write tan in terms of sin/cos
dan815
  • dan815
hello
dan815
  • dan815
remember complimentary angles for sin and cos
dan815
  • dan815
|dw:1438277241493:dw|
Nnesha
  • Nnesha
\[\large \rm cot (x - \frac{ \pi }{ 2 }) =\frac{ \cos( \frac{ \pi }{ 2 }- x) }{ \sin(\frac{ \pi }{ 2 } -x)}\] i guess we have to use this formulas http://prntscr.com/7ywjsc :D and btw i meant to say write cot in terms of cos/sin
anonymous
  • anonymous
What do we do from here?
dan815
  • dan815
ok well lets fix these errors first
Nnesha
  • Nnesha
use these two formulas http://prntscr.com/7ywn75
dan815
  • dan815
|dw:1438277549934:dw|
dan815
  • dan815
|dw:1438277660458:dw|
Nnesha
  • Nnesha
opps the negative sign ~.~
dan815
  • dan815
|dw:1438277743950:dw|
dan815
  • dan815
see why cos(90 deg - x) = sin(x)
dan815
  • dan815
you have a lot of information here, look through this stuff and work out your problem now
Nnesha
  • Nnesha
and u should remember even/odd formulas \[\cos( - x) = \cos(x)\]\[\sin(-x)=-\sin(x)\]\[\tan(-x)=-\tan(x)\]

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