To go from town A to town B a plane must fly about 1780 km at an angle of 30 degrees west of north how far north of A is B? (ans : 1542 km)

how to do the sum??

Question

To go from town A to town B a plane must fly about 1780 km at an
angle of 30 degrees west of north how far north of A is B? (ans :
1542 km)
how to do the sum??

Jyoti Pant · Accepted Answer

From the above figure,cos300=ACABOr AC=AB cos300Given, AB=1780 kmSo, AC=1780cos300=1780×32=1541
48 kmi e  B is 1541
48 km north of A
cos600=ADABOr AD=AB cos600=1780×12=890 kmi e
 B is 890 km west of A

To go from town A to town B a plane must fly about 1780 km at an angle of 30 degrees west of north how far north of A is B? (ans : 1542 km) how to do the sum??

To go from town A to town B a plane must fly about 1780 km at an angle of 30 degrees west of north how far north of A is B? (ans : 1542 km)

how to do the sum??