2013 · Q85
If 5sinθ+12cosθ=13, then 5cosθ−12sinθ equals
Elementary MathematicsTrigonometry
- A−2
- B−1
- C0
- D1
Explanation
Square and add: (5cos−12sin)²=0. Answer C.
If 5sinθ+12cosθ=13, then 5cosθ−12sinθ equals
Explanation
Square and add: (5cos−12sin)²=0. Answer C.