Pure Maths EQ - Inverse Trigonometric Function and Solving Inverse Trigonometric Equation

[@tboyszn]

im confused, how did he get the sin(theta) = cos(pi/21 - theta) ?

[@Adam_Geddss]

It's a useful trigonometric identity called cofunction: sin(x) = cos(90 - x), e.g. sin(90) = cos(90-90). sin(90) is 1 and so is cos(0)

[@JoelOlanipekun]

Such a good teacher. Thank you

[@amieee_xo]

I’m scared for tomoz

[@larinaagezailia6929]

same dude same

[@Gregorbogus]

we are all gna aquire a cheeky a*

[@larinaagezailia6929]

@@GregorbogusNGL that A* looks like its on its way wbu how did u find it?

[@Gregorbogus]

@@larinaagezailia6929 Icl I found it more difficult than paper 1, had to rush two out of 4 questions right at the end because I had no time and had to leave that trig question bc no time but it was sm marks so I’m a bit worried

[@zeuscv874]

@@Gregorboguswhat did u get in the end

[@faridahzalwango6776]

is this an edexcel question

[@larinaagezailia6929]

literally cuz iv never seen a qs like this

[@faridahzalwango6776]

@Larina Agezailia it better not be cuz I have never learnt this in my life😭

[@sungdripwoo7887]

its on the edexcel spec but i havent seen it come up before, feel like it might come up tomoroow lol

[@larinaagezailia6929]

@@faridahzalwango6776 same idk i hope it goes well for al of us

[@larinaagezailia6929]

@@sungdripwoo7887 pls dont jinx it :(