Question

Evaluate the value of x and y from the following figure.

Answer 1

Answer:

x=5m , y=45°

Explanation:

In triangle ADC cos60°= DC/AC

=> 1/2=DC/10

=> DC=5m

Now in triangle CDB, angle CDB=90°

=> CD^2 +BD^2 =BC^2

=> BD^2=50-25=25

=> BD=5m

Since BD=CD=5m

=> angleDCB=angleDBC=y°

Now by angle sum property in triangle CDB

90°+y°+y°=180°

=>2y°=90°

=>y=45°

Hope it will help...

Answer 2

i think it would be helpful. oh sorry angle y=45. because 90