If A= 2x+ 4x, then for all real x: - Vidyadip

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
$\frac{3}{4}\leq\text{A}\leq\frac{13}{16}$
✓
$\frac{3}{4}\leq\text{A}\leq1$

✓

Answer

Correct option: D.

$\frac{3}{4}\leq\text{A}\leq1$

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