Hey.

The question is find the value of R and the value of A.

sinx+ 2cosx = Rcos(x-A)

i can find R which is square root of 5, but i keep getting 1.11 for A and the answer is 0,46 (radians)

can anyone help?

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- November 19th 2009, 07:19 AMOasis1993sin a sinx+ b cosx
Hey.

The question is find the value of R and the value of A.

sinx+ 2cosx = Rcos(x-A)

i can find R which is square root of 5, but i keep getting 1.11 for A and the answer is 0,46 (radians)

can anyone help? - November 19th 2009, 08:35 AMGrandad