Question

If x = 3 cos2 ө and y = 3 sin2 ө + 2, find x + y.

Answer 1

Answer:

answer is 5

Step-by-step explanation:

x + y = 3 cos²∅ + 3 sin²∅ + 2

x + y = 3 (cos²∅ + sin²∅) + 2

x + y = 3 ( 1 ) + 2              [ cos²∅ + sin²∅ = 1 ]

x + y = 5

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