Show that : (i) tan 48° tan 23° tan 42° tan 67° = 1 Show that : (i) tan 48° tan 23° tan 42° tan 67° = 1 October 5, 2020 Category: Chapter 8 - Introduction to Trigonometry , Maths , NCERT Class 10 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related