nevaehkirk1997
13.07.2020 •
Mathematics
If cos 3 A = sin (A-22) , find A
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Ответ:
A = 28
Step-by-step explanation:
Using the cofunction identity
cos x° = sin(90 - x)°
with x = 3A , then
90 - 3A = A - 22 ( add 3A to both sides )
90 = 4A - 22 ( add 22 to both sides )
112 = 4A ( divide both sides by 4 )
A = 28
Ответ:
-16
Step-by-step explanation:
Simplify the expression.
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