MCQ
$\frac{{dy}}{{dx}} = \cot x\cot y$ નો ઉકેલ મેળવો.
- A$\cos x = c\,\cos {\rm{ec}}y$
- ✓$\sin x = c\sec y$
- C$\sin x = c\cos y$
- D$\cos x = c\sin y$
==> $\log \sec y = \log \sin x + \log c$
==> $\sec y = c\sin x$or$c\sec y = \sin x$.
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કારણ $(R) : \,$ જો $\overline {{\text{AB}}} \,\, = \,\,\vec a ,\;\,\overline {BC} \,\,\, = \,\,\vec b \,$ તો $\overline {AC} = \,\vec a + \,\,\vec b $ (સરવાળા ત્રિકોણ નિયમ )