Answer:
0.55
3/5= .6
2/3= .66
Step-by-step explanation:
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19
sin⁴x - sin²x
sin²x(sin²x - 1)
(1 - cos²x)(1 - cos²x - 1)
(1 - cos²x)(-cos²x)
-cos²x + cos⁴x
cos⁴x - cos²x
15
2×6=8
8+7 =15
2+7 =9
9
