If ∫ cos x cos 2x cos 5x dx = A1 sin 2x + A2 sin 4x + A3 sin 6x + A4 sin 8x + c, then the values of A1, A2, A3, A4 are

\(A_1 = \frac 1 6,\;A_2 = \frac 1 {12},\; A_3 = \frac 1 {18},\; A_4 = \frac 1 {24}\)

\(A_1 = \frac 1 2,\;A_2 = \frac 1 4,\; A_3 = \frac 1 6,\; A_4 = \frac 1 8\)

\(A_1 = \frac 1 8,\;A_2 = \frac 1 {16},\; A_3 = \frac 1 {24},\; A_4 = \frac 1 {32}\)

\(A_1 = \frac 1 4,\;A_2 = \frac 1 8,\; A_3 = \frac 1 {12},\; A_4 = \frac 1 {16}\)

If ∫ cos x cos 2x cos 5x dx = A1 sin 2x + A2 sin 4x + A3 sin 6x + A

1.	If ∫ cos x cos 2x cos 5x dx = A1 sin 2x + A2 sin 4x + A3 sin 6x + A4 sin 8x + c, then the values of A1, A2, A3, A4 are
A.	\(A_1 = \frac 1 2,\;A_2 = \frac 1 4,\; A_3 = \frac 1 6,\; A_4 = \frac 1 8\)
B.	\(A_1 = \frac 1 8,\;A_2 = \frac 1 {16},\; A_3 = \frac 1 {24},\; A_4 = \frac 1 {32}\)
C.	\(A_1 = \frac 1 6,\;A_2 = \frac 1 {12},\; A_3 = \frac 1 {18},\; A_4 = \frac 1 {24}\)
D.	\(A_1 = \frac 1 4,\;A_2 = \frac 1 8,\; A_3 = \frac 1 {12},\; A_4 = \frac 1 {16}\)
Answer» C. \(A_1 = \frac 1 6,\;A_2 = \frac 1 {12},\; A_3 = \frac 1 {18},\; A_4 = \frac 1 {24}\)

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If ∫ cos x cos 2x cos 5x dx = A1 sin 2x + A2 sin 4x + A3 sin 6x + A4 sin 8x + c, then the values of A1, A2, A3, A4 are

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