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Show that -:(1) tan48 tan23 tan42 tan67 = 1 Please Anyone give me answer of this question. ☺️☺️ |
| 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 | |