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Verify if this is an identity cot(-x) tanx=-1

Verify if this is an identity cot(-x) tanx=-1
asked 129k views
1 vote
Verify if this is an identity
cot(-x) tanx=-1

asked
User Tuna
by
8.3k points

1 Answer

6 votes
hello :
cot(-x) tan(x)=-1......(*)
* cot(x) = 1/tan(x)
cot(-x) = -cot(x)= -(1/tan(x))

cot(-x) tan(x) = -(1/tan(x))×tan(x)=-1

answered
User Hughesjmh
by
7.5k points
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