Erfana Beevee Binte Hassan Shariff's answer to mary's Secondary 3 A Maths Singapore question.

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Erfana Beevee Binte Hassan Shariff
Erfana Beevee Binte Hassan Shariff's answer
241 answers (Tutor Details)
We start with LHS since it is more complicated. Since we are trying to show RHS which has only sin A involved, we ‘get rid’ of anything that has cos A in it.
Hope this helps.