NotTim
IF anyone is still awake: sin(7pi/12)+cos(pi/12)
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NotTim
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I should know this, But erk.
shinigami1m
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7pi/12*180/pi pi/12*180/pi
cos 15 + sin 105
NotTim
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Oops. Sorry. I did not clarify:
Simplify the following. the final answer must be exact. However, it isn't necessary to rationalize the denominator.
shinigami1m
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use angle identites for cos (45-30) and sin (60+45)
NotTim
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Sorry. I don't understand....
shinigami1m
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sincos sincos
cos cos sin sin??
NotTim
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Oh.
Ishaan94
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NotHello NotTim,
sin(7pi/12) + cos(pi/12)
cos(pi/2 + pi/12) + cos (pi/2)
Ishaan94
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NotSorry,
sin(pi/2 + pi/12) + cos(pi/2)
NotTim
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Er, I still don't understand...
NotTim
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Wait. So am I doing the addition formula for both of them?
NotTim
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In that, I break both of them up?
Ishaan94
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Don;t do it my way, it's only gonna make it more complicated I thought I would be able to reduce it to Zero but Zero isn't the answer...
shinigam1m is right!
Ishaan94
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sin(105) + cos(15)
sin(60 + 45) + cos(45 - 30)
sin60cos45 + sin45cos60 + cos45cos30 + sin45sin30
NotTim
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I think I m suppose to keep it in radians.
Ishaan94
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keep it in radians then 45 = pi/4, 60 = pi/3 and 30=pi/6
Lili_Perez
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i changed my picture