Question

Show that
Tan 48• tan 16•tan 42•tan 78•=1

Answer 1

Answer:

question is:

Tan 48• tan 16•tan 42•tan 74

Step-by-step explanation:

tan 48• tan 16•tan 42•tan 74

=tan(90-42)*tan42*tan16*tan(90-16)

=(cot42*tan42)*(tan16*cot16)

=1*1=1