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katovenus
[111]
3 years ago
7
Verify the identity cot(x-pi/2)=-tan x
Mathematics
Answer
Comment
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1
answer:
vampirchik
[111]
3 years ago
4
0
To verify the identity we need the following identities:
i)
ii)
iii)
.
Also, we have know that
and
Thus,
By (ii) and (iii) we have:
by simplifying
and
Now,
is clearly -tanx.
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