SinA=cos (A-30) value of A?
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Sin(90-A) = cos (A-30)
Cos(90-A) = cos (A - 30)
(90 - A) = (A - 30)
- A - A = - 30 - 90
2A = 120
A = 60
Cos(90-A) = cos (A - 30)
(90 - A) = (A - 30)
- A - A = - 30 - 90
2A = 120
A = 60
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