The value of $$1+$$$$cos$$⁡$$56$$∘$$+$$$$cos$$⁡$$58$$∘−$$cos$$⁡$$66$$∘is equal to

Correct option is 34cos⁡28∘cos⁡29∘cos⁡33∘

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The value of $1 + \cos 56^{\circ} + \cos 58^{\circ} - \cos 66^{\circ}$ is equal to

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2cos⁡28∘cos⁡29∘cos⁡33∘

4cos⁡28∘cos⁡29∘sin⁡33∘

4cos⁡28∘cos⁡29∘cos⁡33∘

2cos⁡28∘cos⁡29∘sin⁡33∘

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detailed solution

Correct option is C

1+cos⁡56∘+cos⁡58∘−cos⁡66∘=2cos2⁡28∘+2sin⁡62∘sin⁡4∘=2cos2⁡28∘+2cos⁡28∘cos⁡86∘=2cos⁡28∘cos⁡28∘+cos⁡86∘=2cos⁡28∘2cos⁡57∘cos⁡29∘=4cos⁡28∘cos⁡29∘cos33∘

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The value of 1+cos⁡56∘+cos⁡58∘−cos⁡66∘is equal to

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The value of $1 + \cos 56^{\circ} + \cos 58^{\circ} - \cos 66^{\circ}$ is equal to