Posted by ariza on Saturday, November 7, 2009 at 10:15pm.
LS = cscx/cosx
= (1/sinx)/cosx
= 1/(sinxcosx)
RS = sinx/cosx + cosx/sinx
= (cos^2x + sin^2x)/(sinxcosx)
= 1/(sinxcosx)
= LS
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