Trigonometryhard · Past Paper

If 7 sin²θ + 3 cos²θ = 4, then tan θ is:

A√3
B1/√3
C1
D0

✓ Correct Answer: B1/√3

4 sin²θ + 3(sin²θ + cos²θ) = 4 => 4 sin²θ + 3 = 4 => sin²θ = 1/4 => sin θ = 1/2. θ=30. tan 30 = 1/√3.

Share this question

More from Trigonometry