Cot x = cos x csc x
1/tan x = cosx (1/sin x)
1/(sin x / cos x) = cos x / sin x
cos x / sin x = cos x / sin x
The domain of validity is all real number values of x except for sin x = 0.
Assignment: 
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Answer: 
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Explanation: 
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[ Step One ] Switch Sides

[ Step Two ] Add 4 To Both Sides

[ Step Three ] Simplify

[ Step Four ] Check Your Work

[ Step Five ] Question: Is Equation Correct

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Answer:
(a) see attachment
(b) E(x) = 226/105
Step-by-step explanation: see attachment
Nothing just lay in bed all day on my phone-
(-1 + 6)^2 <span>+ (4+5)^2 = </span>106