Question

If Tan Q2A Côt CA-18°) where 2A is an
acute angle
angles find the value of A.
​

Answer 1

Step-by-step explanation:

IT Is given that tan2A=cot(A−18°)

⇒tan2A=cot(90° −(108° −A))

⇒tan2A=tan(108° −A)

{°•° cot(90° −A)=tan(A)}

⇒2A=108° −A

⇒3A=108°

⇒A=108°/3 =36°