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If d is the number of degrees contained in an angle, $\mathrm{m}$ is the number of minutes and s is the number of seconds, then the value of $(\mathrm{s}-\mathrm{m}) /(\mathrm{m}-\mathrm{d})$ is:
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The correct answer is:
$\frac{1}{60}$
$\mathrm{d}=60 \times 60 \mathrm{~s}$
$\mathrm{~m}=60 \mathrm{~s}$
$\frac{s-m}{m-d}=\frac{s-60 s}{60 s-60 \times 60 \mathrm{~s}}=\frac{-59}{60 \times(-59)}=\frac{1}{60}$
$\mathrm{~m}=60 \mathrm{~s}$
$\frac{s-m}{m-d}=\frac{s-60 s}{60 s-60 \times 60 \mathrm{~s}}=\frac{-59}{60 \times(-59)}=\frac{1}{60}$
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