VoiceMaths

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Trigonometry

What is 1+Cos2x

Response

  1. Voice Maths
    VoiceMaths

    Hey Rishabh!
    Here’s the answer to your question:

    cos (2x) = cos²x – sin²x
    using double angle identity

    1 = sin²x + cos²x
    using the fundamental trigonometric identity

    1 + cos (2x)
    = sin²x + cos²x + cos²x – sin²x
    = 2 cos²x

    Final answer: 2 cos²x

    Thanks for reaching out! Always here to help! 🙂

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