Answer :

tonystark
This means the multiplication of the cos of the particular angles

[tex]cos(30^{o}) = \frac{ \sqrt{3} }{2} , cos(45^{o}) = \frac{ \sqrt{2} }{2} [/tex]

So, multiplying them together is 

[tex]= \frac{ \sqrt{3} }{2} *\frac{ \sqrt{2} }{2} = \frac{ \sqrt{6} }{4}[/tex]
kate200468
[tex]cos30^0= \frac{ \sqrt{3} }{2} \ \ \ and\ \ \ cos45^0= \frac{ \sqrt{2} }{2}\\\\cos30^0\cdot cos45^0= \frac{ \sqrt{3} }{2}\cdot \frac{ \sqrt{2} }{2}= \frac{ \sqrt{3} \cdot \sqrt{2} }{2\cdot 2}=\frac{ \sqrt{6} }{4}[/tex]

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