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Vaselesa [24]
4 years ago
15

Prove the identity: sin ((x))-(y)) / cos (x) sin (y) = tan (x) cot (y) - 1

Mathematics
1 answer:
sergeinik [125]4 years ago
4 0

Answer:

Below.

Step-by-step explanation:

sin ((x))-(y)) / cos (x) sin (y)

    sin x cos y - cos x sin y

=  ----------------------------------

           cos x sin y

     sin x cos y

=    ----------------   -   1

     cos x sin y

But tan x = sin x / cos x  and cot y = cos y / sin y

So the above =  tan x cot y - 1.

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