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

Last updated at Oct. 23, 2020 by

If x = 2 sin 2 ๐œƒ  and y = 2cos 2 ๐œƒ + 1, then find x + y

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  1. Class 10
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    3. CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard

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Transcript

Question 13 If x = 2 sin2๐œƒ and y = 2cos2๐œƒ + 1, then find x + yNow, x + y = 2 sin2๐œƒ + 2 cos2๐œƒ + 1 = 2 (sin2๐œƒ + cos2๐œƒ) + 1 Putting sin2๐œƒ + cos2๐œƒ = 1 = 2 ร— 1 + 1 = 2 + 1 = 3

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