Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class
Sin 90 - θ, cos 90 - θ formula
Question 1 (ii) Important Deleted for CBSE Board 2024 Exams
Question 1 (iii) Deleted for CBSE Board 2024 Exams
Question 1 (iv) Important Deleted for CBSE Board 2024 Exams
Question 2 (i) Important Deleted for CBSE Board 2024 Exams
Question 2 (ii) Deleted for CBSE Board 2024 Exams
Question 3 Deleted for CBSE Board 2024 Exams
Question 4 Deleted for CBSE Board 2024 Exams
Question 5 Important Deleted for CBSE Board 2024 Exams You are here
Question 6 Important Deleted for CBSE Board 2024 Exams
Question 7 Deleted for CBSE Board 2024 Exams
sin 90 - θ, cos 90 - θ formula
Last updated at May 29, 2023 by Teachoo
Ex 8.3 ,5 If sec 4A = cosec (A – 20°), where 4A is an acute angle, find the value of A. sec 4A = cosec (A – 20°) cosec (90 – 4A) = cosec (A – 20°) Comparing angles 90 – 4A = A – 20 – 4A – A = – 20 – 90 – 5A = –110 A = (− 110)/(− 5) A = 22°