MCQ
$\int \frac{d x}{\tan x+\cot x}=\ ...........$
- A$\frac{\cos 2 x}{4}+c$
- B$\frac{\sin 2 x}{4}+c$
- C$-\frac{\sin x 2}{4}+c$
- D$-\frac{\cos 2 x}{4}+c$
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વિધાન $2$ : જો $\mathop {\lim }\limits_{x \to {x_0}} \,f\left( x \right)$ અસ્તિત્વ હોય અને $\mathop {\lim }\limits_{x \to {x_0}} \,f\left( x \right) \ne f\left( {{x_0}} \right)$ તો અને તોજ $f : R \to R$ એ $x_0$ આગળ અસતત થાય .