You also may use the alternative approach, such that:

`cot theta = 1/tan theta`

Replacing `1/tan theta` for `cot theta` yields:

`tan theta + 1/tan theta = sec theta csc theta`

Bringing the terms to the left side to a common denominator, yields:

`(tan^2 theta + 1)/tan theta = sec theta csc theta`

Using the trigonometric identity `tan^2 theta + 1 = sec^2 theta` yields:

`(sec^2 theta)/tan theta = sec theta csc theta`

Reducing duplicate factors both sides yields:

`sec...

(The entire section contains 2 answers and 219 words.)

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