Question

4+ tan sq x - sec sqx /cosec sq x​

Answer 1

4+ tan sq x - sec sq x /cosec sq x

4 + tan sq x - 1/cos sq x/1/sin sq x

4 + tan sq x - sin sq x/cos sq x

4 + tan sq x - tan sq x = 4 (Sin sq x/Cos sq x = Tan sq x)

Therefore 4+ tan sq x - sec sqx /cosec sq x = 4