can someone help me? (m is a variable if you didnt know, thats what im trying to figure out)-1.5m = -2.55
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$\sec x=\frac1{\cos x}$
$\therefore \cot^2x\cdot\sec^2x= \frac{\cos^2x}{\sin^2x}\frac{1}{\cos^2x}=\frac{1}{\sin^2x}$