2 If sin 0= 0<0<5, find the exact value of each of the following. 3' 2' (a) sin (20) (b) cos (20) (c) sin 2. (d) cos (a) sin (20) =| (Type an exact answer, using radicals as needed.)

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A: Sinh x=ex-e-x2∴ sinh0=e0-e-02=1-12=0∴sinh0=0      cashx=ex+e-x2∴cash0=e0+e-02=1+12=1⇒cash0=1

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A: We can verify the statement as below.

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A: we use the chain rule to find the derivative of the given function

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