Question

If tan2A=Cot(A+60) find the value of A where 2A is an acute angle

Answer 1

hope this is right...

Answer 2

tan 2A = cot ( A+ 60 )
cot (90-2A)=cot (A+60)
90-2A= A+60
90-60= A+2A
30=3A
A=10