asked 115k views
5 votes
If cos 3 A = sin (A-22) , find A

2 Answers

1 vote

Answer:

54

Explanation:

answered
User Leeroy Hannigan
by
8.2k points
4 votes

Answer:

A = 28

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

answered
User Anri
by
8.7k points

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