Question

the value of tan 25⁰,tan 10⁰,tan 80⁰,tan 65⁰​

Answer 1

Answer:

Let,y = tan25°×tan10°×tan80°×tan65°

or, y = tan(90-65)×tan(90-80)×tan80×tan65

or, y = cot65×cot80×tan80×tan65

or, y = 1