Additional Math – Trigonometry – Using the R-Formula to Change a Trigonometric Expression

$latex \displaystyle 10{{\cos }^{2}}x+4{{\sin }^{2}}x+8\sin x\cos x$ Split 10 cos2x and factorize 8sinxcosx. $latex \displaystyle 6{{\cos }^{2}}x+4{{\cos }^{2}}x+4{{\sin [...]