A Level Mathematics Questionbanks
cos3A + 2cosA = 0 0(A( [5] 5. a) Obtain the solution to: 2cosx cos60 = 2sinx sin60 + 1 0o (x(360o [6] b) Hence or otherwise, obtain the solution to: i) 2cosxcos60 = 2sinxsin60 + 1 0o (x(360o [2] ii) 2cos(x 30)cos60 = 2sin(x 30)sin60 + 1 0o (x(360o [2] 6. Without using a calculator, find the value of: a) sin50ocos10o + sin10ocos50o [2] ................
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