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Precalculus 9 Online
OpenStudy (anonymous):

find all solutions of the equation: secx-tanx=cosx

OpenStudy (shamim):

\[secx-tanx=cosx\]

OpenStudy (shamim):

\[or, 1/cosx-sinx/cosx=cosx\]

OpenStudy (shamim):

\[(1-sinx)/cosx=cosx\]

OpenStudy (shamim):

\[1-sinx=\cos ^{2}x\]

OpenStudy (shamim):

\[or, 1-sinx=1-\sin ^{2}x\]

OpenStudy (shamim):

\[1-sinx=(1-sinx)(1+sinx)\]

OpenStudy (shamim):

\[or, (1-sinx)(1+sinx)-(1-sinx)=0\]

OpenStudy (anonymous):

ok :) and is that it?

OpenStudy (shamim):

\[(1-sinx)(1+sinx-1)=0\]

OpenStudy (shamim):

if \[1-sinx=0\]

OpenStudy (shamim):

\[or, sinx=1\]

OpenStudy (shamim):

\[or, sinx=\sin90\]

OpenStudy (shamim):

\[or, x=90\]

OpenStudy (shamim):

or \[sinx=0\]

OpenStudy (shamim):

\[or, sinx=\sin0\]

OpenStudy (shamim):

\[or, x=0\]

OpenStudy (anonymous):

okay :) and thats the final answer?

OpenStudy (shamim):

ya

OpenStudy (anonymous):

thank you so much

OpenStudy (shamim):

u r most welcome

OpenStudy (shamim):

i expect a medal frm u

OpenStudy (anonymous):

ofc u help me i give u a medal

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