Question

Pls answer this question which is in d image.. ..

Answer 1

cosα=5/13

cosα=b/h

b=5k

h=13k

by pythagoreous theoreom

p=12k

putting in the given equation

((p²/h²-b²/h²)/2*p/h*b/h)*b²/h²

((144/169-25/169)/2*12*5/13*13)25/144

119*5/120*144