Question
Find the value of [cos25°−sin65°]/
[cos25°+sin65°].Solution
 [cos25°−sin65°]/ [cos25°+sin65°].  Use the identity sin 65° = cos (90° - 65°) Since sin 65°= cos 25°, the expression becomes- [cos 25° - cos 25°]/ [cos 25° + cos 25°]  = 0/2cos25° =0 So, the value of the expression is 0.
More Trigonometry Questions
54, 58, 67, 92, 173, 262Â
Find the wrong number in the given number series.
740, 725, 680, 605, 595
- Find the wrong number in the given number series.
300, 600, 200, 900, 112.5, 1125 20, 22, 47, 145, 585, 2920
12, 28, 64, 128, 228, 379
121, 240, 386, 555, 751, 976
Find the wrong number, in the given number series,
4, 10, 20, 40, 100, 250, 500
1, 1, 3, 15, 105, 942
- Find the wrong number in the given number series.
600, 539, 488, 447, 408, 395 225, 45, 450, 90, 900, 150, 1800
Relevant for Exams:
