Go from here.
solve the following equation for A, giving all the roots in the interval 0<A<360 (including 0 and 360, i don't know how to write the dash under the sign) correct to the nearest dp:
ok i already know my results are wrong, i don't want the answers i just want to know where i went wrong
so using tan=sinA/cosA, i eliminate (sinA)^2 from both sides of the equation
which gives 4cosA=1/(cosA^2)
A= 45, 315
where am i wrong?