The value of 2sin (12$^\circ$) $-$ sin (72$^\circ$) is : - DASH

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Question

The value of 2sin (12$^\circ$) $-$ sin (72$^\circ$) is :

${{\sqrt 5 (1 - \sqrt 3 )} \over 4}$

${{1 - \sqrt 5 } \over 8}$

${{\sqrt 3 (1 - \sqrt 5 )} \over 2}$

${{\sqrt 3 (1 - \sqrt 5 )} \over 4}$

Solution

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