It is known that SiNx + cosx = one fifth and 0 degree

It is known that SiNx + cosx = one fifth and 0 degree

Because SiNx + cosx = 1 / 5, so x can't be between 0-90, so TaNx is less than 0, SiNx + cosx = 1 / 5, so square it to get 1 + 2sinxcosx = 1 / 25, sinxcosx = - 12 / 25, use (sinxcosx) / (sin ^ 2x + cos ^ 2x) = -- 12 / 25, divide the denominator by cos ^ 2x to get: TaNx / (1 + Tan ^ 2x) = -
Solving the equation (x-1) square-5 (x-1) + 4 = 0 is our gate, we can take X-1 as a whole, let X-1 = y, then the original equation can be changed into y square-5y + 4 = 0, then the solution is Y1 = 1, y2 = 4. When y = 1, then X-1 = 1, then the solution is x = 2; when y = 4, then X-1 = 4, then the solution is x = 5. So the solution of the original equation is X1 = 2, X2 = 5. Please use this method to solve the equation: (3x + 5) square-4 (3x + 5) + 3 = 0
Let 3x + 5 = y, then the original equation can be reduced to Y & sup2; - 4Y + 3 = 0, the solution is Y1 = 1, y2 = 3, then when 3x + 5 = 1, x = - 4 / 3;
When 3x + 5 = 3, x = - 2 / 3
Is sin1 equal to sin90 degrees?
no
90 ° is the angle system, equivalent to the radian system, the value is π / 4
But π / 4 ≈ 0.785 is not 1
Then sin1 is not equal to sin90 degrees
Question: how to solve the problem of "sin1, cos1, TAN1 size order"?
The solution of the twentieth equation x = 17,
X - 3 / 20 x = 17
(1-3 / 20) x = 17
Seventeen twentieth x = 17
X = 17 / 20
x=20
x=20
How to add sin1 ° square to sin90 ° square
It's the square of sin1 ° plus the square of sin2 ° plus the square of SIN3 + +Sin90 ° squared
（Sin1°)² + (Sin2°)²+ …… + (sin45°)² + (sin46°)² + …… + (Sin89°)² + (sin90°)² = （Sin1°)² + (Sin2°)²+ …… + (sin45°)² + (cos44°)² + … ...
X times 3 / 17 plus x equals 10. Solve the equation
seventeen-seconds
What's 90 degrees?
And cos90, tan90, cot90~
1,0, none, none
Solving the equation x-3 of 5 = x-4 of 3 + 1
（x-3）/5=（x-4）/3+1
3（x-3）=5（x-4）+15
3x-9=5x-20+15
2x=-4
x=-2
What is sin145? Sin90
Sin145 degrees = sin45 degrees = root 2 / 2
Sin90 = 1
Sin145 Degree * sin90 degree = root 2 / 2
Solving equation solving equation 0.5 x-3-0.2 x + 4 = 1
0.5 x-3-0.2 x + 4 = 1
3x-3 = - 1 / 2 x + 1 / 2
2 / 2-x-3 = 3 / X-6 / 2x + 3
7x-1 of 24 = 0.1-0.2x of 1.8-5x + 1 of 12
0.5 part x-3-0.2 part X + 4 = 12 (x-3) - 5 (x + 4) = 12x-6-5x-20 = 1-3x = 27  x = - 93x-3 = - 2 Part X + 2 part 6x-6 = - x + 17x = 7x = 12 part 2-x-3 = 3 part X-6 part 2x + 3 multiply both sides by 6 to get 3 (2-x) - 18 = 2x - (2x + 3) 6-3x-18 = 2x-2x-3-3x = 9x = - 324 part 7x-1 = 1.8 Part 0