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How would i go about this...

Find all values of theta in interval -180 less then equal to theta less then equal to 180 to 1dp

4sin theta=5cos theta I know the cos grpah is a translation of the sine graph but im not too sure what to do

Reply 1

didgeridoo12uk

you need to use...

tan(x) = sin(x) / cos(x)

Reply 2

hazbaz

Original post by didgeridoo12uk

you need to use...

tan(x) = sin(x) / cos(x)

I tried this but it didnt seem to help

Reply 3

didgeridoo12uk

Original post by hazbaz

I tried this but it didnt seem to help

you'll end up with

tan(x) = constant

from that you can work out all the values of x in the range given that satisfy the question

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