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	Session 1. Tuesday September 8.

	Problems:

	1. Let -1 <= x <= 1. Simplify cos (arcsin(x)).

	2. (i) Find arcsin( cos (pi/3)).
	   (ii) Find arcsin( cos (-pi/6)).
	   (iii) Graph y = arcsin(cos x).      
           (iv) Find a formula for arcsin( cos x), 
                for -pi/2 <= x <= pi/2.

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	Session 2. Tuesday September 12.

	Problems:

	1. # 4 p.409

	2. # 18 p.409

	3. # 21 p.409

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