Answer:
64.2
Step-by-step explanation:
Since a right triangle is equal to 90 degrees, you would subtract 25.8 from 90 to get your answer.
Hope this helps :)
is in quadrant I, so
.
is in quadrant II, so
.
Recall that for any angle
,

Then with the conditions determined above, we get

and

Now recall the compound angle formulas:




as well as the definition of tangent:

Then
1. 
2. 
3. 
4. 
5. 
6. 
7. A bit more work required here. Recall the half-angle identities:



Because
is in quadrant II, we know that
is in quadrant I. Specifically, we know
, so
. In this quadrant, we have
, so

8. 
Hi. See the attached file and let me know if you find it fine.
Answer:
you wrote the answer
Step-by-step explanation: