In △ABC, right-angled at B, AB = 7 cm and AC - BC = 1 cm. Find the va…

by pythagoras theorem

7² + x² = ( x + 1 )²

49 +x²  = x² + 1 + 2x 

x = 24

So , BC = 24 & AC = 25

Now , sinC = \(\frac{P}{H}\)  = \(\frac{7}{25}\)