Question

cos45 cos30 + sin45 sin30​

Answer 1

Answer:

cos 45×cos 30 +sin45 ×sin 30

1/√2×√3/2. + 1/√2× 1/2

√3/2√2 +1/2√2

(√3+1)/(2√2)

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Answer 2

$\sf\Large{cos45.cos30 + sin45.sin30 }$

$\sf\Large{\frac{1}{ \sqrt{2} } \times \frac{ \sqrt{3} }{2} + \frac{1}{ \sqrt{2} } \times \frac{1}{2} }$

$\sf\Large{ \frac{ \sqrt{3} }{2 \sqrt{2} } + \frac{1}{2 \sqrt{2} } }$

$\sf\Large{ \frac{ \sqrt{3 } + 1 }{2 \sqrt{2} }}$

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