Sunday, April 7, 2013

Calculate the expression sin(arcsin1/2)+sin(arccos scuare root 3/2).

We'll recall the fact that sin (arcsin x) = x and sin
(arccos x) = sqrt(1 - x^2)


Comparing, we'll
get:


sin (arcsin(1/2))= 1/2
(1)


sin (arccos (sqrt3)/2) = sqrt[1 -
(3/2)^2]


sin (arccos (sqrt3)/2) = sqrt (1 -
3/4)


sin (arccos (sqrt3)/2) = sqrt
[(4-3)/4]


sin (arccos (sqrt3)/2) = sqrt
(1/4)


sin (arccos (sqrt3)/2) = 1/2
(2)


We'll add (1) + (2):


sin
(arcsin(1/2)) + sin (arccos (sqrt3)/2) = 1/2 + 1/2


sin
(arcsin(1/2)) + sin (arccos (sqrt3)/2) =
1


The value of the given expression is sin
(arcsin(1/2)) + sin (arccos (sqrt3)/2) = 1.

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