Trig question
12
Help please, I understand what they've done in the mark scheme, but I've done it a different way and am unsure where my mistake is. Any help would be great
Reply 1
Fesdces1
OP
12
Original post
by Fesdces1Help please, I understand what they've done in the mark scheme, but I've done it a different way and am unsure where my mistake is. Any help would be great
Reply 2
Fesdces1
OP
12
Original post
by Fesdces1Help please, I understand what they've done in the mark scheme, but I've done it a different way and am unsure where my mistake is. Any help would be great
Reply 3
Fesdces1
OP
12
Original post
by Fesdces1I also realised I've missed two solutions for each one but still doesn't explain it
Reply 4
21
Original post
by Fesdces1I also realised I've missed two solutions for each one but still doesn't explain it
When you square both sides of the trig equation you introduce extra solutions (you double the number usually), so youd need to verrify which of the solutions at the end satisfy the original equation. So two of the solutions are correct and as you say, youve missed a couple anyways.
(edited 11 months ago)
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