Aidan makes 12 bracelets on Monday.He makes 8 more bracelets each day from Tuesday through Thursday.How many bracelets does Aida
1 answer:
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Answer:
x = 180
Step-by-step explanation:
First, you need to know
1. Double-angle formula:
cos(2x) =
2. Pythagorean identity:
Back to your problem, replacing the variable by the above:
By Double-angle formula
By Pythagorean identity
Given
, we know -1 < sinx < 1, for every x ∈ R