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Question

Mathematics Question on Trigonometric Functions

Value of 1+cos56∘+cos58∘−cos66∘1+cos56^{\circ}+cos58^{\circ}-cos66^{\circ} is

A

2sin28∘ cos29∘ sin33∘2sin28^{\circ}\,cos29^{\circ}\,sin33^{\circ}

B

4cos28∘ sin29∘ sin33∘4cos28^{\circ}\,sin29^{\circ}\,sin33^{\circ}

C

4cos28∘ cos29∘ cos33∘4cos28^{\circ}\,cos29^{\circ}\,cos33^{\circ}

D

2cos28∘ sin29∘ sin33∘2cos28^{\circ}\,sin29^{\circ}\,sin33^{\circ}

Answer

4cos28∘ sin29∘ sin33∘4cos28^{\circ}\,sin29^{\circ}\,sin33^{\circ}

Explanation

Solution

Answer (b) 4cos28∘ sin29∘ sin33∘4cos28^{\circ}\,sin29^{\circ}\,sin33^{\circ}