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Maths A level question

Please help !!I’m stuck on 11 and 12 part A. Thank youIMG_1896.jpeg
(edited 4 weeks ago)
Original post by JJ5672
Please help !!I’m stuck on 11 and 12 part A. Thank youIMG_1896.jpeg


Please post what you've tried as per forum rules.
Reply 2
Original post by JJ5672
Please help !!I’m stuck on 11 and 12 part A. Thank youIMG_1896.jpeg


for 12a just expand out sin(x+70) and cos(x+20) then recall sinx=cos(90-x) and vice versa to convert for same arguments then divide through by cos I presume to create tan expressions
Original post by yzven
for 12a just expand out sin(x+70) and cos(x+20) then recall sinx=cos(90-x) and vice versa to convert for same arguments then divide through by cos I presume to create tan expressions


It's usual to ask the OP to post an attempt before we give a hint :smile:

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