Question

I don’t even know how to do this

Answer 1

1 – cosθ/1 + cosθ = secθ – 1/secθ + 1

Here, we know that secθ = 1/cosθ

Now,

1 – cosθ/1 + cosθ = secθ – 1/secθ + 1

1 – cosθ/1 + cosθ = 1/cosθ – 1 ÷ 1/cosθ + 1

1 – cosθ/1 + cosθ = 1 – cosθ/cosθ ÷ 1 + cosθ/cosθ

1 – cosθ/1 + cosθ = 1 – cosθ/1 + cosθ

Hence Proved!!

-TheUnknownScientist 72