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Ex 8.1, 2 - In fig, find tan P - cot R - Chapter 8 - Finding values of expressions

  1. Chapter 8 Class 10 Introduction to Trignometry
  2. Serial order wise
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Ex 8.1, 2 In figure , find tan P โ€“ cot R. Finding sides of triangle In right โˆ† ๐‘ƒ๐‘„๐‘…, Using Pythagoras theorem (Hypotenuse)2 = (Height)2 + (Base)2 PR2 = PQ2 + QR2 132 = 122 + QR2 13 ร—13=12ร—12+๐‘„๐‘…2 169 = 144 + QR2 169 โ€“ 144 = QR2 25 = QR2 QR2 = 25 QR = โˆš25 = โˆš(5ร—5) = 5 Thus, QR = 5 cm tan P = (๐‘ ๐‘–๐‘‘๐‘’ ๐‘œ๐‘๐‘๐‘œ๐‘ ๐‘–๐‘ก๐‘’ ๐‘ก๐‘œ โˆ ๐‘ƒ)/(๐‘ ๐‘–๐‘‘๐‘’ ๐‘Ž๐‘‘๐‘—๐‘Ž๐‘๐‘’๐‘›๐‘ก ๐‘ก๐‘œโˆ ๐‘ƒ) = ๐‘„๐‘…/๐‘ƒ๐‘„ = 5/12 Now, tan P โ€“ cot R = 5/12โˆ’5/12 = 0

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