Answer:
4v+3+5v+6=180(being linear pair)
9v+9=180
9v=180-9
v=171/9
v=19
Step-by-step explanation:
Measurement a is 45
measurement b is 135
Answer:
ummm i cant see the question it is sidewards
Step-by-step explanation:
Answer:
x=30o+n90on∈Z
Step-by-step explanation:
cos2x=sin(90o−2x)=sin(2x−30o)
Which mean 90o−2x=2x−30o+n360o
or 90o−2x+2x−30o=(2n+1)180o
The later cannot be true.
so x=30o+n90on∈Z