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Rus_ich [418]
3 years ago
15

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

Mathematics
1 answer:
12345 [234]3 years ago
7 0
<span>hello :
</span>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

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