[填空题]
BT represents the height of a skysc j)f l1n.lbajv.af 6c;raper* kh1a*,r zvna, with its base at B and top at T. Jack has an apartment on th,vka r1a*n z*he 32nd floor at C, three fifths of the way to the top of the building.
From a point A, on horizontal ground 200 m from B, the angle of elevation to C is $38^{\circ}$.
1.Calculate BC, the height of Jack's apartment above the ground. m
2.Calculate the angle of depression from T to A. $^{\circ}$
