(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

If Sin(u)=[itex]\frac{\sqrt{2}}{2}[/itex] and cos(v)=[itex]\frac{4}{5}[/itex] and

0≤ u ≤[itex]\frac{∏}{2}[/itex] and [itex]\frac{3∏}{2}[/itex]≤ v ≤ 2∏

find cos (u+v)

3. The attempt at a solution

cos(u)=[itex]\frac{\sqrt{2}}{2}[/itex] and cos(v)=[itex]\frac{4}{5}[/itex]

Do I just add them together? I feel like I'm missing something, but maybe the problem really is that simple.

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# Homework Help: Trig homework help

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