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TRIGONOMETRIC FUNCTIONS — MATHS STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceMATHSTRIGONOMETRIC FUNCTIONS1 Mark
MCQ
Let A and B denote the statements:$\text{A}:\cos\text{a}+\cos\text{b}+\cos\text{g}=0$
$\text{B}:\sin\text{a}+\sin\text{b}+\sin\text{g}=0$
If $\cos(\beta-\text{y})+\cos(\text{y}-\alpha)+\cos(\alpha-\beta)=\frac{-3}{2}$ then:
  • ✓
    A is false and B is true.
  • B
    Both A and B are true.
  • C
    Both A and B are false.
  • D
    A is true and B is false.
✓

Answer

Correct option: A.
A is false and B is true.
  1. A is false and B is true.

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