Arnold K H Tan's answer to lana <3's Secondary 3 A Maths Singapore question.
done
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This is one possible approach
Date Posted:
1 year ago
how does the denominator become sinA/cosA - sinB/cosB
Divide each term by the term in blue.
Similar to
(xy - zy) ÷ (ay)
= (xy ÷ ay) - (zy ÷ ay)
= x/a - z/a
Similar to
(xy - zy) ÷ (ay)
= (xy ÷ ay) - (zy ÷ ay)
= x/a - z/a
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