If x = 2 sin 2 ๐ and y = 2cos 2 ๐ + 1, then find x + y
Last updated at Oct. 23, 2020 by Teachoo
Transcript
Question 13 If x = 2 sin2๐ and y = 2cos2๐ + 1, then find x + yNow, x + y = 2 sin2๐ + 2 cos2๐ + 1 = 2 (sin2๐ + cos2๐) + 1 Putting sin2๐ + cos2๐ = 1 = 2 ร 1 + 1 = 2 + 1 = 3
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