Answer:
The answer is given in the picture
Step-by-step explanation:
Do you remember me calista
I am alvena
a=180-142=38 degree
b= 180-38-88=54 degree
c=b (since the two lines are parallel to each other) therefore c=54 degree
Answer:
I believe only b since you need equal sides and angles
Answer:
sin(a) =
Step-by-step explanation:
cos(2a) = cos²(a)-sin²(a) = [1-sin²(a)]-sin²(a)= 1 - 2sin²(a)
1 - 2sin²(a) = -20/29
- 2sin²(a) = -49/40
sin²(a) = 49/80
sin(a) =
sin(a) = =
sin(a) =