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Q.The value of cos⁡20∘−sin⁡20∘\cos 20^\circ - \sin 20^\circ is

a
2sin⁡25∘\sqrt{2} \sin 25^\circ
b
2cos⁡25∘\sqrt{2} \cos 25^\circ
c
2sin⁡65∘\sqrt{2} \sin 65^\circ
d
2cos⁡65∘\sqrt{2} \cos 65^\circ

Correct Answer: Option C

The correct solution involves applying the fundamental concept to derive the final value step by step...

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