3
-
c –
- 5
2
1
g
I/
1
-c – 1
2

Ten times the square of a non-zero number is eqaul to ninety times the number

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)