2. Show that:
(1) tan 48° tan 23° tan 42° tan 67° = 1
Answers
Answered by
2
Answer:
tan48°tan23°cot(90°-48°)cot(90°-23°)
tan48°tan23°cot48°cot23°
tan48°cot48°tan23°cot23°
=1[cotAtanA =1]
Answered by
2
Answer:
tan48.tan23.tan42.tan67
=(tan48.tan42)(tan23.tan67)
=(tan48.cot48)(tan23.cot23)
=(1)(1)
=1
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