Question

Show that tan48°tan23°tan42°tan67°=1

Answer 1

Step-by-step explanation:

HERE IS UR ANSWER..

➡️tan 48° tan 23° tan 42° tan 67°=1

➡️tan(99°-42°) tan(90°-67°) tan42° tan 67°

➡️cot42° cot67° tan42° tan67°

➡️[cot42° tan42°] [cot67° tan67°]

➡️1×1

➡️1

=1

Answer 2

Answer:

1

Step-by-step explanation:

tan48 tan23 tan42 tam69=1

1/cot48*cot48 1/cot23*cot23

1*1

1