Product Identities (Product to Sum Identities)

Last updated at April 16, 2024 by

Product Identities (Product to Sum Identities)

Product to sum identities are

  2 cos⁡x  cos⁡y = cos⁡ (x + y) + cos⁡(x - y)

  -2 sin⁡x  sin⁡y = cos⁡ (x + y) - cos⁡(x - y)

  2 sin⁡x  cos⁡y = sin⁡ (x + y) + sin⁡(x - y)

  2 cos⁡x  sin⁡y = sin⁡ (x + y) - sin⁡(x - y)

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Transcript

Product Identities (Product to Sum Identities) Product to sum identities are 2 cos⁡x cos⁡y = cos⁡ (x + y) + cos⁡(x - y) -2 sin⁡x sin⁡y = cos⁡ (x + y) - cos⁡(x - y) 2 sin⁡x cos⁡y = sin⁡ (x + y) + sin⁡(x - y) 2 cos⁡x sin⁡y = sin⁡ (x + y) - sin⁡(x - y)

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo