Answer:
Step-by-step explanation:
By expanding it , we get
we know that
so,
1 + sin2x
Given
(sinx + cosx)² ← expand using FOIL
= sin²x + 2sinxcosx + cos²x
[ sin²x + cos²x = 1 and sin2x = 2sinxcosx ]
= 1 + sin2x
Mean:
Median: 63, 66, 67, 68, 73, 74, 76, 78, 80, 83, 86, 87, 88, 89, 89, 89, 93, 93, 95, 99, 100
= 169/2
Mode: 100
Answer: I believe the answer is b.