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