Question 13 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard - Solutions of Sample Papers for Class 10 Boards

Last updated at August 8, 2026 by Teachoo

If x = 2 sin ² 𝜃 and y = 2cos ² 𝜃 + 1, then find x + y

If x = 2 sin^2 θ and y = 2 cos^2 θ + 1, then find x + y - Teachoo

Next: Question 14 → Remove Ads

Transcript

Question 13 If x = 2 sin2𝜃 and y = 2cos2𝜃 + 1, then find x + yNow, x + y = 2 sin2𝜃 + 2 cos2𝜃 + 1 = 2 (sin2𝜃 + cos2𝜃) + 1 Putting sin2𝜃 + cos2𝜃 = 1 = 2 × 1 + 1 = 2 + 1 = 3

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.

Class 6

Class 7

Class 8

Class 9

Class 10

Class 11

Class 12

Courses

Interesting

Popular