<span><span>![y=sinx+tgx\\sinx:x\in R;\\tgx=\frac{sinx}{cosx},\ cosx\neq0 \to \ x\neq\frac{\pi}{2}+\pi n,\ n\in Z.](https://tex.z-dn.net/?f=y%3Dsinx%2Btgx%5C%5Csinx%3Ax%5Cin+R%3B%5C%5Ctgx%3D%5Cfrac%7Bsinx%7D%7Bcosx%7D%2C%5C+cosx%5Cneq0+%5Cto+%5C+x%5Cneq%5Cfrac%7B%5Cpi%7D%7B2%7D%2B%5Cpi+n%2C%5C+n%5Cin+Z.)
Ответ: ![x\neq \frac{\pi}{2}+\pi n,\ n\in Z.](https://tex.z-dn.net/?f=x%5Cneq+%5Cfrac%7B%5Cpi%7D%7B2%7D%2B%5Cpi+n%2C%5C+n%5Cin+Z.)
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7/36-36^2-7/36+
0-36^2=
-36^2 или -1296
8x^2 - 8y^2 = 8( x^2 - y^2) = 8(x+ y)(x - y)
- a^2 +6a- 9 = - (a^2 - 6a + 9) = - ( a - 3)^2 = - (a - 3)(a - 3)
ab^3 - ba^3 =ab( b^2 - a^2) = ab( b - a)(b + a)
1/Х = ( 1/y ) - ( 1/z )
1/x = ( z - y )/yz
yz = x( z - y )
••••••••••••••
X = yz / ( z - y )
•••••••••••••••
yz = x( z - y )
yz = xz - xy
xz - yz = xy
z( x - y ) = xy
z = xy / ( x - y )
X^2-25=x^2-6x+9+2
-25=-6x+9+2
-25=-6x+11
6x=11+25
6x=36
x=36