Posted by Jose on Tuesday, August 24, 2010 at 8:30am.
check your typing, your statement is not true.
I figured you must mean
1/(secØtanØ) - cscØ = - sinØ
Proof:
LS = 1/((1/cosØ)(sinØ/cosØ)) - 1/sinØ
= cos^2 Ø/sinØ - 1/sinØ
= (cos^ Ø - 1)sinØ
= - sin^2 Ø/sinØ
= =sinØ
= RS
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