In ΔXYZ, ∠X = 90o, YZ = 15 cm, and XZ = 12 cm. Then find cos Y.
Answer & explanation
Correct answer: option 3
Using pythagoras theorem ,
122 + XY2 = 152
XY = 9
cosY = \(\frac{9}{15}\) = \(\frac{3}{5}\)
In ΔXYZ, ∠X = 90o, YZ = 15 cm, and XZ = 12 cm. Then find cos Y.
Correct answer: option 3
Using pythagoras theorem ,
122 + XY2 = 152
XY = 9
cosY = \(\frac{9}{15}\) = \(\frac{3}{5}\)