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AysviL [449]
3 years ago
6

If sin (7y) = cos (5y + 14), find y.

Mathematics
1 answer:
Reil [10]3 years ago
7 0

Answer:

Step-by-step explanation:

sin(7y)=cos(5y+14)=sin(90-(5y+14))=sin(76-5y)

7y=76-5y

12y=76

y=76/12=19/3

or

sin(7y)=cos (5y+14)=sin (90+(5y+14))=sin (5y+104)

7y=5y+104

2y=104

y=52

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