MCQ
If $\text{A}=\sin2\text{x}+\cos4\text{x}, $ then for all real x:
- A$\frac{13}{16}\leq\text{A}\leq1$
- B$1\leq\text{A}\leq2$
- C$\frac{3}{4}\leq\text{A}\leq\frac{13}{16}$
- D$\frac{3}{4}\leq\text{A}\leq1$
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Angle made by line with measured anticlockwise is called inclination of the line:
The tangent of angle between the lines whose intercepts on the axes are a, -b and b, -a, respectively, is
$\frac{\text{a}^2-\text{b}^2}{\text{ab}}$
$\frac{\text{b}^2-\text{a}^2}{2}$
$\frac{\text{b}^2-\text{a}^2}{2\text{ab}}$