Question

Question #57502

Answer 1

See below.

Explanation:

`sin(90^@)=1`

`cos(90^@)=0`

`sectheta=1/costheta`

`sec(90^@)=1/cos(90^@)=`Undefined (Division by zero)

`tan(90^@)=` Undefined

as `theta->90^@` `color(white)(88)tantheta->oo`