Answer:
(4) -1
Step-by-step explanation:
f(pi/2) = 2(pi/2) =pi
g(f(pi/2)) = g(pi) = cos(pi) = -1
-1
f(pi/2) = 2(pi/2) = pi
g(f(pi/2)) = g( pi) = cos (pi) = -1
9514 1404 393
Explanation:
1. ∠BAC ≅ ∠BCA, BD ≅ BE, ∆BDA and ∆BEC are right triangles . . . . given
2. ∆ABC is isosceles . . . . definition of isosceles triangle
3. BA ≅ BC . . . . definition of isosceles triangle
4. ∆BDA ≅ ∆BEC . . . . HL theorem
5. AC ≅ CE . . . . CPCTC
Hope this is correct
Have a good day!
5x+12=37
5x=25
x=5
I hope this helps
