Chor Teng's answer to Nancy luo's Secondary 4 A Maths Singapore question.
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For any sin(x+©) or cos(x+©), mostly is just expand it using the formula.
For sin(x/2) or cos(x/2), you utilise the double angle formula for cos x. And manipulate it to get the answer.
Hope it helps! Rmb to refer back to formula to see if you can adjust the form of it to get your answers :D
For sin(x/2) or cos(x/2), you utilise the double angle formula for cos x. And manipulate it to get the answer.
Hope it helps! Rmb to refer back to formula to see if you can adjust the form of it to get your answers :D
Date Posted:
4 years ago
Hi sry i cant get the ans (iv) √3 +2√2 /6
Hello!
From iv,
1/3 (√ 3/2) + 1/2 (2√2 /3)
=(√3 + 2√2) / 6
I think you missed out the brackets on the answer you sent above
From iv,
1/3 (√ 3/2) + 1/2 (2√2 /3)
=(√3 + 2√2) / 6
I think you missed out the brackets on the answer you sent above
Ohh ic thank uu
No prob!!
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