sqrt{3} cot 20^{circ} - 4 cos 20^{circ} નું મ | vedclass

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(A) ધારો કે $E = \sqrt{3} \cot 20^{\circ} - 4 \cos 20^{\circ}$.$E = \sqrt{3} \frac{\cos 20^{\circ}}{\sin 20^{\circ}} - 4 \cos 20^{\circ}$$E = \frac{\s

Vedclass · Accepted Answer

$1$

Vedclass · Answer

(A) ધારો કે $E = \sqrt{3} \cot 20^{\circ} - 4 \cos 20^{\circ}$.$E = \sqrt{3} \frac{\cos 20^{\circ}}{\sin 20^{\circ}} - 4 \cos 20^{\circ}$$E = \frac{\sqrt{3} \cos 20^{\circ} - 4 \sin 20^{\circ} \cos 20^{\circ}}{\sin 20^{\circ}}$$2 \sin 	heta \cos 	heta = \sin 2	heta$ નો ઉપયોગ કરતા,$4 \sin 20^{\circ} \cos 20^{\circ} = 2 \sin 40^{\circ}$ મળે.$E = \frac{\sqrt{3} \cos 20^{\circ} - 2 \sin 40^{\circ}}{\sin 20^{\circ}}$$E = \frac{\sqrt{3} \cos 20^{\circ} - 2 \sin(60^{\circ} - 20^{\circ})}{\sin 20^{\circ}}$$E = \frac{\sqrt{3} \cos 20^{\circ} - 2 (\sin 60^{\circ} \cos 20^{\circ} - \cos 60^{\circ} \sin 20^{\circ})}{\sin 20^{\circ}}$$E = \frac{\sqrt{3} \cos 20^{\circ} - 2 (\frac{\sqrt{3}}{2} \cos 20^{\circ} - \frac{1}{2} \sin 20^{\circ})}{\sin 20^{\circ}}$$E = \frac{\sqrt{3} \cos 20^{\circ} - \sqrt{3} \cos 20^{\circ} + \sin 20^{\circ}}{\sin 20^{\circ}}$$E = \frac{\sin 20^{\circ}}{\sin 20^{\circ}} = 1$.

$\sqrt{3} \cot 20^{\circ} - 4 \cos 20^{\circ}$ નું મૂલ્ય કેટલું થાય?

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