drian2322
09.12.2020 •
Mathematics
PLEASE HELP ME WITH THIS QUESTION I REALLY NEED HELP ASAP
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Ответ:
12:8 or 12 pencils and 8 pens
Step-by-step explanation:
Ответ:
Step-by-step explanation:
We know that sinA=cos (90-A)
and, sin²A +cos²A= 1
Now , here sin(45+A) = cos {90-(45+A)}
= cos(45-A)
cos²(45-A)+ sin²(45-A)= 1
by Applying (sin²A +cos²A= 1)