Question

if tan 5Φ.tan 4Φ = 1 then Φ =​

Answer 1

Answer:

pie is 180 and that symbol is pie or theta

Answer 2

It is given that

tan5Φ.tan4Φ=1

tan5Φ=1/tan4Φ

tan5Φ=cot4Φ

tan5Φ=tan(90-4Φ)

5Φ=90-4Φ

5Φ+4Φ=90

10Φ=90

Φ=9 Ans.