If sin x + cos x = frac{1}{5}, then tan 2x is | vedclass

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(D) Given $\sin x + \cos x = \frac{1}{5}$.Squaring both sides,we get $(\sin x + \cos x)^2 = (\frac{1}{5})^2$.$\sin^2 x + \cos^2 x + 2 \sin x \cos x =

Vedclass · Accepted Answer

$\frac{24}{7}$

Vedclass · Answer

(D) Given $\sin x + \cos x = \frac{1}{5}$.Squaring both sides,we get $(\sin x + \cos x)^2 = (\frac{1}{5})^2$.$\sin^2 x + \cos^2 x + 2 \sin x \cos x = \frac{1}{25}$.Since $\sin^2 x + \cos^2 x = 1$ and $2 \sin x \cos x = \sin 2x$,we have $1 + \sin 2x = \frac{1}{25}$.$\sin 2x = \frac{1}{25} - 1 = -\frac{24}{25}$.Now,$\cos^2 2x = 1 - \sin^2 2x = 1 - (-\frac{24}{25})^2 = 1 - \frac{576}{625} = \frac{49}{625}$.$\cos 2x = \pm \frac{7}{25}$.Since $\sin 2x = -\frac{24}{25}$,$	an 2x = \frac{\sin 2x}{\cos 2x} = \frac{-24/25}{\pm 7/25} = \mp \frac{24}{7}$.Given the options provided,the correct value is $\frac{24}{7}$.

If $\sin x + \cos x = \frac{1}{5},$ then $\tan 2x$ is

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