document.write( "Question 630843: Use the fact that cos(u+v) = cosucosv - sinusinv to calculate sin 75 degrees. \n" ); document.write( "

Algebra.Com's Answer #397680 by richard1234(7193) $\"\"$ $\"About$

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Easier method: Use the identity sin(u+v) = sin u cos v + sin v cos u, where u = 30, v = 45 (deg).\r
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