CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard

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

Last updated at August 14, 2026 by

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

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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

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