Trigonometryhard · Past Paper
What is the value of cot^2 30 - 2 cos^2 60 - 3/4 sec^2 45 - 4 sin^2 30?
A0
B1
C2
D-1
✓ Correct Answer: A — 0
3 - 2(1/4) - 3/4(2) - 4(1/4) = 3 - 0.5 - 1.5 - 1 = 0.
Share this question
More from Trigonometry
- An aeroplane at altitude h observes two points on opposite sides of the river at angles α and β. Width of river?
- If x = a cos theta and y = b sin theta, then b^2 x^2 + a^2 y^2 is equal to:
- If sin θ + sin²θ = 1, then the value of (cos²θ + cos⁴θ) is:
- If cos theta = 1, what is the value of theta in degrees?
- Find the value of (sin θ / (1 - cot θ)) + (cos θ / (1 - tan θ)).