tan5• tan25 tan45 tan65 tan85 =1 prove that
akshaysingh30798:
I have taken a BSc degree
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i am asking soumya
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u 10 class
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Answered by
7
Tan5. Tan25. Tan45. Tan65. Tan85=1
Tan5 = cot(90-5)
Tan25=cot(90-25)
Now
Cot85.Cot65.Tan45.Tan65.Tan85
Tan45
=1
Hence prooved
Tan5 = cot(90-5)
Tan25=cot(90-25)
Now
Cot85.Cot65.Tan45.Tan65.Tan85
Tan45
=1
Hence prooved
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