Section 5.2 (16, 36, 76, 80, 82)community.wvu.edu/~sbarton/math441/f2013/HW 4 and 5.pdf · END HW 4 Begin HW 5 Section 6.1 (12, 22, 26, 32, 37, 50) Section 6.2 (24, 34, 36, 46) 80.

Section 5.2 (16, 36, 76, 80, 82)

76. ⟨ ⟩ ∫

∫

(where u = sin2x). Hence projgf = 0.

Section 5.3 (10, 31, 48, 63)

To simplify notation let ⟨ ⟩ (a scalar).

Thus ‖ ‖ ‖ ‖

⟨ ⟩ Now since ⟨ ⟩ = 0 whenever i j all the cross terms go to zero and we get

‖ ‖ ⟨ ⟩

⟨ ⟩ ⟨ ⟩. But ⟨ ⟩ = 1 so

‖ ‖

. But , so adding an unnecessary absolute

value (it’s a square), we get ‖ ‖ | | | |

| |

END HW 4 Begin HW 5

Section 6.1 (12, 22, 26, 32, 37, 50)

Section 6.2 (24, 34, 36, 46)