2sin 2A – sin 4A 2sin 2A + sin 4A = tan²A​

Question

2sin 2A – sin 4A
2sin 2A + sin 4A
= tan²A​

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Gia Bảo 4 years 2021-09-03T18:17:53+00:00 1 Answers 19 views 0

Answers ( )

  1. nguyetanh
    0
    2021-09-03T18:18:59+00:00
    Reply

    Answer:

    tan²A – sin²A = tan² A sin²A

    from LHS,

    tan²A -sin²A

    = (sin²A / cos²A) – sin²A……[tan A=sin A/cos A]

    = (sin²A – sin²Acos²A) / cos²A

    = sin²A (1- cos²A) / cos² A [tan A = sinA / cos A]

    = tan²A sin²A= RHS

    .•. hence proved

    Step-by-step explanation:

    Hope it is helpful…

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