sin 30 derajat di kali cos 45 derajat + cos 30 derajat di kali sin 45 derajat

[tex]sin30\times cos45 + cos30 \times sin45 \\ = \frac{1 }{2} \times \frac{1}{2} \sqrt{2} + \frac{1}{2} \sqrt{3} + \frac{1}{2} \sqrt{2} \\ = \frac{1}{4} \sqrt{2} + \frac{1}{4} \sqrt{6} [/tex]