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use an identity to write...

use an identity to write the expression as single trig function.

sqrt1-cos26degrees/2

a. sin 26 deg

b. sin 13 deg

c. cos 26 deg

d. cos 13 deg

sqrt1-cos26degrees/2

a. sin 26 deg

b. sin 13 deg

c. cos 26 deg

d. cos 13 deg

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