prove that
tan48°tan23°tan42°tan67°=1
Answers
Answered by
2
Step-by-step explanation:
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
Answered by
3
TO PROVE:
tan48°tan23°tan42°tan67°=1
PROOF:
TAN48°TAN23°TAN42°TAN67°
TAN48°TAN23°COT48°COT23°
TAN48°COT48°TAN23°COT23°
=1×1
=1
PROVED
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