In case you’re wondering, the previous trigonometry proving question here was just a warm-up. This then, guys and gals, is the real deal. If you can prove this, you are A1/A-List/Elite (or whatever honour our society decides to bestow upon you) student material and Miss Loi will kneel down and kow-tow to you!
Just joking lah – Miss Loi’s poor tender forehead will become blue-black if this happens!
Prove the following trigonometric identity:
P.S. If you’re (predictably) stuck, think of how you rationalize your surds. If it’s of any comfort to you, Miss Loi was stumped too when she first saw this 😛