1. The problem statement, all variables and given/known data
Given: sec = where 0< <90
and sin(A- )=sinA-3cosA
Determine the solution of
6cosA +3 = 2sinA
for A [-180; 180], rounded off to one decimal digit.
2. Relevant equations
3. The attempt at a solution
3=2sinA - 6cosA
3=2(sinA-3cosA)
=sinA-3cosA
= sin(A- )
Now I can't get rid of the theta