Would appreciate help on solving questions like this:
Write down the formula for cos(C+D)
Use the triangles to show that cos(C+D) = ...
Thanks.
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Outcome 3 unit 2 ~ Help please
Started by castlehead, Nov 27 2011 02:46 PM
1 reply to this topic
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Posted 12 December 2011 - 10:37 PM
You would use the trig formula,
cos(C+D)=cosCcosD-sinCsinD and sub in the values of C and D then just solve it by finding the (cosC![[^x]](http://www.hsn.uk.net/forum/public/style_emoticons/default/powerx.gif)
cosD) - (sinC sinD)
Hope that helps,
Andrew M
cos(C+D)=cosCcosD-sinCsinD and sub in the values of C and D then just solve it by finding the (cosC
cosD) - (sinC sinD)Hope that helps,
Andrew M
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