Trigonometrymedium · Past Paper
Simplify: (1 - sin²θ) * sec²θ
A1
B0
Csin²θ
Dcos²θ
✓ Correct Answer: A — 1
1 - sin²θ = cos²θ. Then cos²θ * sec²θ = cos²θ * (1/cos²θ) = 1.
Share this question
More from Trigonometry
- Find the value of cos 1° * cos 2° * cos 3° ... cos 90°.
- If sin θ = 0, what is θ?
- From the top of a 7 m high building, the angle of elevation of the top of a cable tower is 60° and the angle of depression of its foot is 45°. Find the tower height.
- Which of the following is equivalent to cot(A - B)?
- From a point on ground, the elevation of a tower is θ. After walking a distance 'a' towards it, elevation is 45°, and after 'b' more, it is 90-θ. Height is: