Question

If tan2A=Cot(A-18°) Find the value of B​

Answer 1

⇒A=36

Step-by-step explanation:

Given tan2A=cot(A−18

0

)

⇒cot(90−2A)=cot(A−18

0

)[∵tanθ=cot(90−θ)]

Comparing angles we get

90−2A=A−18

⇒90+18=A+2A

⇒3A=108

⇒A=

3

108

⇒A=36

Answer 2

answer

tan2A=cot(A-18)

tan45=cot45

or

tan30=cot60

or

tan60=cot30

or

tan0=cot90

or

tan90=cot0

by putting only one value in place of a or b