Answer:
Option (3)
Step-by-step explanation:
In a right triangle,
Cosine rule →
Sine rule → 
In the given triangle,
By cosine rule,


Or cos(h°) = z ÷ x
Therefore, Option (3) will be the answer.
Answer:

Step-by-step explanation:

we substitute the value of "y" in the equation:
Answer:
4x
Step-by-step explanation: