Multiple choice general knowledge math & puzzles

What is value of sinA*cosA*tanA*secA*sinB*cosB, if angle

  1. 1\2

  2. 1\2root2

  3. 1

  4. 0

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Substitute the given angles: sin45° = 1/√2, cos45° = 1/√2, tan45° = 1, sec45° = √2, sin90° = 1, cos90° = 0. The expression becomes (1/√2) × (1/√2) × 1 × √2 × 1 × 0 = 0 because cos90° = 0. Any expression multiplied by zero equals zero.

AI explanation

With `