Langdon thinks that the sum sin30+sin30 is equal to sin60. do you agree with langdon? explain what this means about the sum of the sines of angles.

Langdon is not correct. It means distributive property is not applicable for sines of angles.

Step-by-step explanation:

According to Langdon

We need to check whether Langdon is correct or not.

Taking LHS,

Taking RHS,

Since LHS ≠ RHS, therefore Langdon is not correct.

It means distributive property is not applicable for sines of angles.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0