Ex 3.3, 8
Last updated at March 8, 2017 by Teachoo
Transcript
Ex 3.3, 8 Prove that cosβ‘γ (Ο + π₯) cosβ‘γ(β π₯)γ γ/(sinβ‘γ (Ο β π₯)γ cosβ‘γ"( " Ο/2 " + " π₯")" γ ) = cot2 π₯ Taking L.H.S. πππ β‘γ(π + π₯) γπππ γβ‘γ(βπ₯)γ γ/(π ππβ‘(π β π₯) πππ β‘γ"(" π/2 " +" π₯")" γ ) Putting Ο = 180Β° = πππ β‘γ(180 + π₯) γπππ γβ‘γ(βπ₯)γ γ/(π ππβ‘(180 β π₯) πππ β‘γ"(" 90" + " π₯")" γ ) = (βπππ β‘γπ₯ Γ πππ β‘π₯ γ)/((sinβ‘γπ₯) Γγ( βsinγβ‘π₯) γ ) = (β πππ 2π₯)/(β π ππ2π₯) = cot2x = R.H.S. Hence proved
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Chapter 3 Class 11 Trigonometric Functions
Serial order wise
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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 8 years. He provides courses for Practical Accounts, Taxation and Efiling at teachoo.com .