Proving Trigonometry identities

One of my Sec 4 girl send me these proving trigo identities questions few days ago.

I am so sorry I have been very busy with tutors referrals and CNY preparation that I can only reply today. 🙂


Decided to post the solutions up on the blog since I have a little time this afternoon as my tuition is cancelled. 🙂

Pardon me for the low quality images. I just did the questions on my whiteboard, take pictures with my mobile phone and uploaded here. Keke.


Happy Lunar New Year to all! 🙂

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2016-02-05 14.16.15

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