Posted by **Natash** on Saturday, November 15, 2008 at 2:40am.

Give exact answers

Sin(11pi/8)

so this is sin(pi/4+pi/3)

sin(pi/4)*cos(pi/3)+cos(pi/3)*sin(pi/4)

rad2/2*1/2+1/2*rad2/2

which gives me rad2+rad2 all over 4 ...i don't know y im getting it wrong

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