if sin6A=cos9A, then angle A is equal to?

1 6
2 36
3 54
4 1 half

3 answers

angle A = 6

if sin x = cos y, then x and y must be complementary angles, that is, they must add up to 90º

so 6A + 9A = 90
A = 6

as Emileee stated, just thought I would explain why

Angle A = 6

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