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OpenStudy (anonymous):
75 degsin15deg+sin75degcos15deg=1 ?
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OpenStudy (mathstudent55):
There's somethng missing in the beginning, right?
OpenStudy (anonymous):
cos
OpenStudy (mathstudent55):
sin(A + B) = sinAcosB + cosAsinB
OpenStudy (mathstudent55):
cos75sin15 + sin75cos15 = sin75cos15 + cos75sin15 = sin(75 + 15) = Can you continue now?
OpenStudy (anonymous):
yea i got it right its 1
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OpenStudy (mathstudent55):
correct, since it sin(90) = 1
OpenStudy (anonymous):
thanks
OpenStudy (mathstudent55):
wlcm
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