# A level maths

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#1
if i have sin((360t/365)-75.964) (from Rsin(theta-alpha)
how do I work out t when y=-1
I know its 350.8 but I dont know how to get there
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1 month ago
#2
(Original post by Meggggggggggg)
if i have sin((360t/365)-75.964) (from Rsin(theta-alpha)
how do I work out t when y=-1
I know its 350.8 but I dont know how to get there
You know sin(270) = -1, so ...
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#3
(Original post by mqb2766)
You know sin(270) = -1, so ...
so sin(270)=sin(360t/365 - 75.964)?
0
1 month ago
#4
(Original post by Meggggggggggg)
so sin(270)=sin(360t/365 - 75.964)?
Or just
270 = 360t/365 - 75.964
Basically take asin().
0
1 month ago
#5
confused
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1 month ago
#6
(Original post by JeanMilburn)
confused
Might help to say why?
0
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