Posted by **joy** on Monday, December 27, 2010 at 4:20pm.

im taking test

need answer quick'

use the sum and difference identities to write the expression as the cosine of the angle. be sure to simplify the anglee:

cospi/9cospi/3-sin

pi/9sinpi/3

Friday

March 24, 2017
Posted by **joy** on Monday, December 27, 2010 at 4:20pm.

im taking test

need answer quick'

use the sum and difference identities to write the expression as the cosine of the angle. be sure to simplify the anglee:

cospi/9cospi/3-sin

pi/9sinpi/3

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