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OpenStudy (mrmanman305):
Cos(x+pi/2)=-sinx Can anyone help verify? Medal
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OpenStudy (aravindg):
Sure :) do you know cos(A+B) formula?
OpenStudy (mrmanman305):
No I don't think I wrote that one down
OpenStudy (faiqraees):
cos(x+π/2) = cosx cosπ/2-sinx sinπ/2
OpenStudy (mrmanman305):
Would that be it?
OpenStudy (anonymous):
yup
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OpenStudy (mrmanman305):
Thanks to all of you
OpenStudy (anonymous):
Who Gets The Medal?
OpenStudy (mrmanman305):
Well it would be @FaiqRaees because he answered first
OpenStudy (anonymous):
ok
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