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If x, y in [0,2pi] then find the total n...

If `x, y in [0,2pi]` then find the total number of order pair `(x,y)` satisfying the equation `sinx .cos y = 1`

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`sinxcosy = 1`
`=> cosy = 1/sinx`
`=> cosy = cosec x`
Now, there are only two cases when `cos theta and cosec theta ` are equal. When both of them are `1` or `-1`.
Case 1: When `cos y = cosecx = 1`
`=>cos y = 1 , cosecx =1`
`=>y = 0,2pi and x = pi/2`
...
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