Write the correct alternative in the following:

If y = e^{tan x}, then (cos² x)y₂ =

Write the correct alternative in the following:

If y = sin (m sin^–1 x), then (1 – x²) y₂ – xy₁ is equal to

Write the correct alternative in the following:

If y = (sin^–1 x)², then (1 – x²) y₂ is equal to

Write the correct alternative in the following:

If a > b > 0, then

Write the correct alternative in the following:

If then (2xy₁ + y)y₃ =