Ex 7.3, 18 - Integrate cos 2x + 2 sin2 x / cos2 x dx - Integration using trigo identities - 2x formulae

  1. Class 12
  2. Important Question for exams Class 12
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Ex 7.3, 18 (cosโก2๐‘ฅ + 2 sin^2โก๐‘ฅ)/cos^2โก๐‘ฅ ๐‘‘๐‘ฅ โˆซ1โ–’(cosโก2๐‘ฅ + 2 sin^2โก๐‘ฅ)/cos^2โก๐‘ฅ ๐‘‘๐‘ฅ =โˆซ1โ–’(1 โˆ’ 2 sin^2โก๐‘ฅ + 2 sin^2โก๐‘ฅ)/cos^2โก๐‘ฅ ๐‘‘๐‘ฅ =โˆซ1โ–’1/cos^2โก๐‘ฅ ๐‘‘๐‘ฅ =โˆซ1โ–’sec^2โก๐‘ฅ ๐‘‘๐‘ฅ =๐ญ๐š๐งโก๐’™+๐‘ช

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