joe1591
06.05.2021 •
Mathematics
Evaluate the following expression.
cos870° - sin780º =
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Ответ:
180
Step-by-step explanation:
You would start by finding the area of the trapezium 1/2(a+b)×h
8+4=12 12/2=6 6×3=18
3 is the height becayse of pythagoras
18 × length of shape(10)=180