Let S = {l/2, cos x, cos 2x, ..., cos nx, sin x, sin 2x,..., sin nx}
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S = {l/√2, cos x, cos 2x, ..., cos nx, sin x, sin 2x,..., sin nx}
Show that S is an orthonormal set in C[-π, π] with inner product defined by (2).
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We saw in Example 3 that 12 cos x cos 2x cos nx is an orthono...View the full answer
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