B cost sint -at √₁+q²t²' √√₁+q²t²' √1+q²t² 7. Let f(t) = (a) Show that || f(t) || = 1 for all t. (b) Show directly that f'(t)-f(t) = 0 for all t. with a 0.

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Q: 6. FinD F(S) if f(t)= t· cost

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