# pre calc

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Use the sum-to-product formula to simplify the expression:
If sin 52 + sin 8 = sin A, 0<A<90, then
A =??? degrees.

• pre calc -

sin 52 + sin 8 = 2 sin 30 * cos 22
so
sin A = 2*.5*.927 = .927
A= 68 degrees

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