Convert cotangent into cosine divided by sine.

Factorize cosine half-angle.

Solve for x by finding all angle between but not include 0 degrees and 360 degrees.

a-math group tuition at woodlands, admiralty, marsiling, yew tee.

Convert cotangent into cosine divided by sine.

Factorize cosine half-angle.

Solve for x by finding all angle between but not include 0 degrees and 360 degrees.

a-math group tuition at woodlands, admiralty, marsiling, yew tee.