Question

find the value of (1+tan20)(1+tan24)(1+tan25)(1+tan21)

Answer 1

Answer:

4

Step-by-step explanation:

since ,

if a+b=45

then,

(1+tan a) (1+tan b) =2

hence

(1+tan 20)(1+tan24)(1+tan25)(1+tan21)

{(1+tan20)(1+tan25)}{(1+tan24)(1+tan21)}

=2*2

=4