learningizk00l
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Express 5cos(x-60°)+3cosx in the form Rsin(x+a) where R>0 and 0°<a<90°
I can solve the standard ones for example if it was just 5cos(x-60°)
but I'm unsure what to do with the +3cosx
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Zelerate
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How else can you write 5cos(x-60)?
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learningizk00l
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(Original post by Zelerate)
How else can you write 5cos(x-60)?
omg i've got it haha i was doing the stupidest thing, thanks anyway
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