A= pi times r*r so if you are using 3.14 as pi the answer is 78.5 because 5x5=25
25x3.14=78.5
The answer is the first choice.
Answer:
see explanation
Step-by-step explanation:
(1)
(a)
sin(a) =
= 
(b)
cos(a) =
= 
(c)
tan(a) =
= 
----------------------------------------------------
(2)
(a)
sin(b) =
= 
(b)
cos(b) =
= 
(c)
tan(b) =
= 