The trigonometric expression \(\cos 2 A +\sin 2 A\) can be written as
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
Correct Answer: Option D
Explanation:
\(\operatorname{Cos} 2 A+\operatorname{Sin} 2 A=\operatorname{Cos}^{2} A-\operatorname{Sin}^{2} A+2 \operatorname{Sin} A \operatorname{Cos} A\)
\(\operatorname{Cos} 2 A+\operatorname{Sin} 2 A=\operatorname{Cos}^{2} A-\operatorname{Sin}^{2} A+2 \operatorname{Sin} A \operatorname{Cos} A\)