Commerce (English Medium) Class 12 - CBSE Question Bank Solutions

If \[y \sqrt{x^2 + 1} = \log \left( \sqrt{x^2 + 1} - x \right)\] ,Show that \[\left( x^2 + 1 \right) \frac{dy}{dx} + xy + 1 = 0\] ?

If \[\sin \left( xy \right) + \frac{y}{x} = x^2 - y^2 , \text{ find}  \frac{dy}{dx}\] ?

If  \[\tan \left( x + y \right) + \tan \left( x - y \right) = 1, \text{ find}  \frac{dy}{dx}\] ?

If \[e^x + e^y = e^{x + y} , \text{ prove that } \frac{dy}{dx} = - \frac{e^x \left( e^y - 1 \right)}{e^y \left( e^x - 1 \right)} or \frac{dy}{dx} + e^{y - x} = 0\] ?

If \[\cos y = x \cos \left( a + y \right), \text{ with } \cos a \neq \pm 1, \text{ prove that } \frac{dy}{dx} = \frac{\cos^2 \left( a + y \right)}{\sin a}\] ?

If \[\sin^2 y + \cos xy = k,\] find  \[\frac{dy}{dx}\] at \[x = 1 , \] \[y = \frac{\pi}{4} .\] 

If \[y = \left\{ \log_{\cos x} \sin x \right\} \left\{ \log_{\sin x} \cos x \right\}^{- 1} + \sin^{- 1} \left( \frac{2x}{1 + x^2} \right), \text{ find } \frac{dy}{dx} \text{ at }x = \frac{\pi}{4}\] ?

If \[\sqrt{y + x} + \sqrt{y - x} = c, \text {show that } \frac{dy}{dx} = \frac{y}{x} - \sqrt{\frac{y^2}{x^2} - 1}\] ?

Differentiate \[x^{1/x}\]  with respect to x.

Differentiate \[x^{\sin x}\]  ?

Differentiate \[\left( 1 + \cos x \right)^x\] ?

Differentiate \[x^{\cos^{- 1} x}\] ?

Differentiate \[\left( \log x \right)^x\] ?

Differentiate \[\left( \log x \right)^{\cos x}\] ?

Differentiate \[\left( \sin x \right)^{\cos x}\] ?

Differentiate \[e^{x \log x}\] ?

Differentiate  \[\left( \sin x \right)^{\log x}\] ?

Differentiate \[{10}^{ \log \sin x }\] ?

Differentiate \[\left( \log x \right)^{ \log x }\] ?

Differentiate \[{10}^\left( {10}^x \right)\] ?