The values are
.
Apply Pythagorean identity:
.
(Substitute
)
Subtract 49 from each side.
\
Take square root of each side.
\
Find A,
\
(Substitute
)

Apply inverse each side.
\

The given triangle ABC is a right angle triangle so 
In a triangle the sum of the angles are 
(Substitute
)

Subtract 157 from each side.
\

The values are
.