User:Mbartley57

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Calculus prerequisite answers:

1. tan(t) = sin(t) /cos(t)

2. csc(t) = 1/x therefore x = sin(t)

3. tan2(x) + 1= sec2(x)--> (sin2(x) + cos2(x))/cos2(x) --> 1/cos2(x) --> sec2(x)

4. COS(A+B)= COSACOSB - SINASINB Proof1--> COS(A+A)= COS(2A) = COS2A - SIN2A -->2COS2A - 1 Proof2--> previous results used for half angle by substituting A for 2A and A/2 for A. Proof3--> COS2A = (COS2A+1)/2 Proof4--> COS3A =