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Mathematics 14 Online
OpenStudy (elifbestegul):

Simplify; (sinx-cosx)/[sin^2(x)-cos^2(x)]

OpenStudy (awkwardequalsme):

your answer would be in alternative forms

OpenStudy (welshfella):

factor the denominator first ( its the difference of 2 squares)

OpenStudy (welshfella):

then you can take out common factors

OpenStudy (welshfella):

can you do that?

OpenStudy (elifbestegul):

I am trying right now @welshfella

OpenStudy (welshfella):

ok

OpenStudy (elifbestegul):

It brought me back to where I was in the beginning @welshfella

OpenStudy (welshfella):

sin^2 x - cos ^2 x = (sin x + cos x)(sin x - cos x)

OpenStudy (welshfella):

so we have sin x - cos x ------------------------- (sin x + cos x)(sin x - cos x)

OpenStudy (elifbestegul):

then it equals to secx+cosecx, right?

OpenStudy (welshfella):

NO now compare the top to the bottom - what is common to both?

OpenStudy (elifbestegul):

sinx-cosx

OpenStudy (welshfella):

right so that leaves 1 / (sinx + cos x)

OpenStudy (welshfella):

- which does NOT equal cosec x + sec x

OpenStudy (elifbestegul):

thank you so much @welshfella

OpenStudy (welshfella):

yw

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