Edexcel as maths P2 new spec 2019 18th June

Draw the graph, include the significant angles. Then work out where 0.7 roughly goes through the line between the 80° and 440°. Then use the symmetry to work out the value(s). That probably doesn’t help , but just draw the graph and you may follow.

Hope this helps a little,

I did the final question. I added 180° to the principal value of x = 70.97 as the tan function repeats every 180° so tan(x) = tan(x 180), until you get all of the values within the range given.

thanks a lot dear ...