Question

Sin A - 2 sin ^A upon 2cos^A - cos A equals to tan A

Answer 1

Step-by-step explanation:

Sin A -2sin3A /2cos3A-cosA

= sinA (1-2sin2A )/cosA ( 2cos2A - 1)

= sinA (1-2sin2A)/ cosA (2 (1-sin2A) -1)

=sinA (1-2 sin 2A)/cosA (1-2sin2A)

=sinA/cosA

=tanA

Hence proved

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Answer 2

Answer:

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