Question

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Answer 1

Answer:

$\huge\bold\red{ANSWER}$

Step-by-step explanation:

$\large{\underline{\rm{\red{SOLUTION :}}}}$

$\implies \sf \frac{1}{2}(2cos48^ocos12^o)\\ \\ \implies \sf \frac{1}{2}[cos(48+12)+cos(48-12)]\\ \\ \implies \sf \frac{1}{2}[\frac{1}{2}+\frac{\sqrt{5}+1}{4}]$

$\implies \sf \frac{1}{2}[\frac{3+\sqrt{5}}{4}]\\ \\ \implies \sf (\frac{3+\sqrt{5}}{4})$