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Ex 7.3, 8 - Chapter 7 Class 12 Integrals (Term 2)

Last updated at July 11, 2018 by

Ex 7.3, 8 - Integrate 1 - cos x / 1 + cos x - Integration using trigo identities - 2x formulae

Ex 7.3, 8 - Chapter 7 Class 12 Integrals - Part 2

Transcript

Ex 7.3, 8 1 − 𝑐𝑜𝑠 𝑥﷮1 + 𝑐𝑜𝑠 𝑥﷯ ﷮﷮ 1 − cos﷮𝑥﷯﷮1 + cos﷮𝑥﷯﷯﷯ We know that Thus, our equation becomes ﷮﷮ 1 − cos﷮𝑥﷯﷮1 + cos﷮𝑥﷯﷯﷯ 𝑑𝑥= ﷮﷮ 2 sin﷮2﷯﷮ 𝑥﷮2﷯﷯﷮2 cos﷮2﷯﷮ 𝑥﷮2﷯﷯﷯﷯ = ﷮﷮ sin﷮2﷯﷮ 𝑥﷮2﷯﷯﷮ cos﷮2﷯﷮ 𝑥﷮2﷯﷯﷯﷯ 𝑑𝑥 = ﷮﷮ tan﷮2﷯﷮ 𝑥﷮2﷯﷯﷯ 𝑑𝑥 = ﷮﷮ sec﷮2﷯﷮ 𝑥﷮2﷯ −1﷯﷯﷯𝑑𝑥 = ﷮﷮ sec﷮2﷯﷮ 𝑥﷮2﷯﷯﷯𝑑𝑥− ﷮﷮𝑑𝑥﷯ = tan﷮2﷯ ﷮ 𝑥﷮2﷯﷯﷮ 1﷮2﷯﷯ −𝑥+𝐶 =𝟐 𝐭𝐚𝐧﷮ 𝒙﷮𝟐﷯﷯ −𝒙+𝑪

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