Question 3 (Or 1st) - CBSE Class 10 Sample Paper for 2019 Boards

Last updated at Nov. 22, 2018 by Teachoo

Question 3 (OR 1 ^st question)

Write the value of cot ² ⁡θ - 1/sin ² ⁡θ

Transcript

Question 3 (OR 1st question) Write the value of cot^2⁡𝜃−1/sin^2⁡𝜃 cot^2⁡𝜃−1/sin^2⁡𝜃 Writing cot θ = cos⁡𝜃/sin⁡𝜃 = (cos⁡𝜃/sin⁡𝜃 )^2−1/sin^2⁡𝜃 = cos^2⁡𝜃/sin^2⁡𝜃 −1/sin^2⁡𝜃 = (cos^2⁡𝜃 − 1)/sin^2⁡𝜃 Now, sin2 θ + cos2 θ = 1 cos2 θ = 1 – sin2 θ = ((1 − sin^2⁡𝜃) − 1)/sin^2⁡𝜃 = (− sin^2⁡𝜃)/sin^2⁡𝜃 = –1

CBSE Class 10 Sample Paper for 2019 Boards

Question 3 (Or 1st) You are here

CBSE Class 10 Sample Paper for 2018 Boards →

Class 10

Sample Papers, Previous Year Papers and Other Questions

CBSE Class 10 Sample Paper for 2019 Boards
CBSE Class 10 Sample Paper for 2018 Boards

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.