Question

in triangle abc b = 90° sin a =3/5 find cos a and tan a​

Answer 1

1 - sin²a = cos²a

1 - (3/5)² = cos²a

1 - 9/25 = cos²a

16/5 = cos²a

Cosa = 4/5

tan a = sina/Cosa = 3/4

Answer 2

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