Answer:
The correct option is:
A. x = b-acosC
Step-by-step explanation:
We are given a triangle ABC
in each and every option cosC is present, so we calculate the value of cosc
cosC=[tex]\dfrac{Base}{Hypotenuse}\\ \\=\dfrac{DC}{BC}\\ \\=\dfrac{b-x}{a}[/tex]
⇒ acosC=b-x
⇒ x=b-acosC
Hence, correct option is:
A. x = b-acosC
