Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class

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Question 1 Deleted for CBSE Board 2024 Exams

Question 2 Deleted for CBSE Board 2024 Exams

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Question 5 Important Deleted for CBSE Board 2024 Exams

Question 6 Deleted for CBSE Board 2024 Exams

Question 7 Important Deleted for CBSE Board 2024 Exams

Chapter 3 Class 11 Trigonometric Functions

Serial order wise

Last updated at June 22, 2023 by Teachoo

Example 12 Find the value of tan 13π/12 tan (13 π" " )/12 = tan ("Ο + " π /ππ) = tan π /ππ = πππ (π /πβπ /π) Using tan (π₯ β π¦) = (tanπ₯ β tanβ‘y)/(1 + tan π₯ tanβ‘y ) = (tanβ‘γ Ο/4γ β tan Ο/6)/(1 + tan Ο/4 tanβ‘γ Ο/6γ ) = (π β π/βπ)/(π + π/( βπ)) = (βπ β π)/(βπ + π) = (β3 β 1)/(β3 + 1) Γ (β3 β 1)/(β3 β 1) = (β(3 )β 1)2/(β3 + 1)(β3 β 1) = (3 + 1 β 2β3)/((β3)2 β (1)2) = (4 β 2β3)/(3 β 1) = 2 β βπ