Answer:
a) No
b)
Step-by-step explanation:
a)
If , we have that , and .
, so and are not complementary when
b)
If , , and form half a circle, that means they sum to .
We now need to solve for .
Plugging in for and gives .
Combining like terms on the left side gives .
Subtracting a and a from both sides gives .
This means that and we're done.