mdelgado167
give the exact value of f(pi/3) if f(X)=6cosx10sin2x



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mdelgado167
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why 7x+4?

AravindG
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substitute \(x\) with \(\dfrac{\pi}{3}\)

mdelgado167
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ok and then from here I am not clear what do

zordoloom
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Do you know what is the cosine and sine of pi/3?

mdelgado167
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cosine pi/3=.9998329795 and sine pi/3=.0182760276

AravindG
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:) Then whats the problem ?

zordoloom
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Do you know what the unit circle is?

AravindG
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just put those values in the function get the answer be happy :)

zordoloom
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The values are not correct. cosine of pi/3 is .5

zordoloom
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and sine of pi/3= sqrt(3)/2

mdelgado167
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ok. I have the answer my teacher put up on the board which is 35\[\sqrt3\]

zordoloom
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Remember that you are finding the values in radians, not degrees.

mdelgado167
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but I cannot seem to get this value

mdelgado167
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oh! that helps thanks :)

zordoloom
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dw:1359283703684:dw

zordoloom
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Just continue from there.

zordoloom
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dw:1359283831486:dw

mdelgado167
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oh ok I got it! thank you so much!

zordoloom
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Sure.