Question

Evaluate tan 80, 75, 15, 10 degrees

Answer 1

Answer:

tan80

tan(60+20)

as we know that:

tan(x+y)=tanx+tany/1-tanxtany

now,

tan60+tan20/1-(tan60)*(tan20)

note: all measure are in degree.

1.73+0.36/1-(1.73)*(0.36)

2.09/0.38

5.5. answered