tan(90+X) = -cotx i don't understand the 90+x part..
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Using the identity , we get: = (Dividing throughout by ) = = =
Last edited by alexmahone; July 5th 2009 at 07:52 AM.
sorry then??
Originally Posted by z1llch sorry then?? I re-edited my post. Now do you understand?
why do them become zero?
Originally Posted by z1llch why do them become zero?
Originally Posted by z1llch tan(90+X) = -cotx i don't understand the 90+x part..
Originally Posted by alexmahone Using the identity , we get: = (Dividing throughout by ) Actually, you can't do that, because is undefined. You have to change into as skeeter showed above. 01
Last edited by yeongil; July 5th 2009 at 08:47 AM. Reason: Big oops!
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