Trigonometryhard · Past Paper
What is the value of sin^6 A + cos^6 A + 3 sin^2 A cos^2 A?
A0
B1
C2
D3
✓ Correct Answer: B — 1
Using a^3 + b^3 + 3ab(a+b) = (a+b)^3 where a=sin^2 and b=cos^2. Since a+b=1, the expression equals 1.
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✓ Correct Answer: B — 1
Using a^3 + b^3 + 3ab(a+b) = (a+b)^3 where a=sin^2 and b=cos^2. Since a+b=1, the expression equals 1.
Share this question