zanaplen27
23.11.2020 •
Mathematics
You are dealt one card from a standard 52-card deck. Find the probability of being dealt a red card
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Ответ:
It’s a 50% chance
Step-by-step explanation:
Ответ:
see explanation
Step-by-step explanation:
Using the identities
1 + cot²x = cosec²x
cosec²x =
, cotx = 
Consider the left side
cos²A + cos²A cot²A ← factor out cos²A from each term
= cos²A(1 + cot²A)
= cos²A × cosec²A
= cos²A ×
=
= cot²A
= right side , thus proven