Question

I trigonometry how to decide that what should we do in the first step?

Answer 1

Answer:

by observing that what we have to prove in the question

hope it will help u

Answer 2

Answer:

Hope it helps you .

Step-by-step explanation:

There are three steps:

Choose which trig ratio to use. - Choose either sin, cos, or tan by determining which side you know and which side you are looking for.

Substitute. ...

Solve. ...

Step 1: Choose which trig ratio to use. ...

Step 2: Substitute. ...

Step 3: Solve. ...

Step 1: Choose the trig ratio to use. ...

Step 2: Substitute.