Friday, March 18, 2016

Calculate tan(x-y), if sin x=1/2 and sin y=1/3. 0

We'll write the formula of the tangent of difference of 2
angles.


tan (x-y) = (tan x - tan y)/(1 + tan x*tan
y)


Now, we'll have to establish the signature of tan x a
and tan y. We know from enunciation that, tan x belongs to the first quadrant and it is
has positive and tan y belongs to the second quadrant and it is
negative.


tan x=sin x/cos
x


cos x = sqrt[1 - (sin
x)^2]


cos x = sqrt[1 -
(1/2)^2]


cos x = sqrt(1 -
1/4)


cos x = sqrt3/2


tan x =
(1/2)/(sqrt3/2)


tan x = sqrt
3/3


tan y = -(1/3)/sqrt[1 -
(1/3)^2]


tan y =
-(1/3)/sqrt(8/9)


tan y =
-1/2sqrt2


tan y =
-(sqrt2)/4


tan (x-y) = [(sqrt 3)/3 +
(sqrt2)/4]/[1 - (sqrt6)/12]

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Calculate tan(x-y), if sin x=1/2 and sin y=1/3. 0

We'll write the formula of the tangent of difference of 2 angles. tan (x-y) = (tan x - tan y)/(1 + tan x*tan y) ...