defence exam Indian Navy Fireman/Fire Engine Driver Mock Test 2024 Quantitative Aptitude Trigonometry Max and Min Value of Trigonometric Functions
If x = sin 130° cos 80°, y = sin 80° cos 130°, and z = 1+ xy, then which of the following is true?
1
x > 0, y < 0 and 0 < z < 1
2
x > 0, y < 0 and z > 1
3
x < 0, y < 0 and 0 < z < 1
4
x > 0, y > 0 and z > 0