Question

the value of cos 45° is (a) 1/2 (b) root 2/2 (c) root 3 /2 and (d) 2/root3​

Answer 1

$The \: value \: of \: cos 45\degree$

$= \frac{1}{\sqrt{2}}$

$= \frac{1\times \sqrt{2}}{\sqrt{2}\times \sqrt{2}}$

$= \frac{\sqrt{2}}{2}$

Therefore.,

$Option \: \pink{ ( b ) } \: is \: correct.$

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