Question

(1+tan 15°) (1+tan30°) = ?

Answer 1

Answer:

tan 15 = tan(45-30)

tan45- tan30/1+tan45*tan30

=1-1/√3/1+1*1/√3

√3-1/√3+1

So, (1+tan15)(1+tan30)

(1+√3-1/√3+1)(1+1/√3)

if we solve this we'll get the answer as 4-2√3

hope it helps.....