Question

evaluate cos 30 cos 45-sin 30 sin 45

Answer 1

$\huge\pink{\mathfrak{hey!!}}$

$\large\green{\textbf{Values:}}$

$cos30 \degree = \frac{ \sqrt{3} }{2} \\ \\ cos45 \degree = \frac{1}{ \sqrt{2} } \\ \\ sin30 \degree = \frac{1}{2} \\ \\ sin45 \degree = \frac{1}{ \sqrt{2} }$

$\huge\red{\mathfrak{Answer:}}$

√3/2×1/√2-1/2×1/√2

√3/2√2 -1/2√2

(√3-1)/2√2

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