If tan A = 10/15, then what will be the value of cos2 A ?

59/269 49/269 9/13 169/269

9/13

tanA = \(\frac{10 }{15}\) By using pythagoras theorem , P2 + B2 = H2 102 + 152 = H2 H = 5√13 cos2A = (\(\frac{15 }{ 5√13}\))2 = (\(\frac{3 }{ √13}\) )2 = \(\frac{9 }{ 13}\)