What is the general solution for cot^4(x)=cot^4(x)sin(x) ?

The general solution for cot^4(x)=cot^4(x)sin(x) is x= pi/2+pin

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Popular Trigonometry >

cot^4(x)=cot^4(x)sin(x)

Solution

cot^{4} (x) = cot^{4} (x) sin (x)

Solution

x = \frac{π}{2} + πn

Degrees

x = 9 0^{\circ} + 18 0^{\circ} n

Solution steps

cot^{4} (x) = cot^{4} (x) sin (x)

Subtract

cot^{4} (x) sin (x)

from both sides

cot^{4} (x) - cot^{4} (x) sin (x) = 0

Factor

cot^{4} (x) - cot^{4} (x) sin (x) : - cot^{4} (x) (sin (x) - 1)

cot^{4} (x) - cot^{4} (x) sin (x)

Factor out common term

- cot^{4} (x)

= - cot^{4} (x) (- 1 + sin (x))

- cot^{4} (x) (sin (x) - 1) = 0

Solving each part separately

cot^{4} (x) = 0 or sin (x) - 1 = 0

cot^{4} (x) = 0 : x = \frac{π}{2} + πn

cot^{4} (x) = 0

Using the Zero Factor Principle:

ab = 0

then

a = 0

b = 0

cot (x) = 0

The solution is

cot (x) = 0

General solutions for

cot (x) = 0

cot (x)

periodicity table with

πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} cot (x) \mp \infty 31 \frac{3}{3} 0 - \frac{3}{3} - 1 - 3

x = \frac{π}{2} + πn

x = \frac{π}{2} + πn

sin (x) - 1 = 0 : x = \frac{π}{2} + 2 πn

sin (x) - 1 = 0

Move

1

to the right side

sin (x) - 1 = 0

Add

1

to both sides

sin (x) - 1 + 1 = 0 + 1

Simplify

sin (x) = 1

sin (x) = 1

General solutions for

sin (x) = 1

sin (x)

periodicity table with

2 πn

cycle:

x 0 \frac{π}{6} \frac{π}{4} \frac{π}{3} \frac{π}{2} \frac{2 π}{3} \frac{3 π}{4} \frac{5 π}{6} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x π \frac{7 π}{6} \frac{5 π}{4} \frac{4 π}{3} \frac{3 π}{2} \frac{5 π}{3} \frac{7 π}{4} \frac{11 π}{6} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

x = \frac{π}{2} + 2 πn

x = \frac{π}{2} + 2 πn

Combine all the solutions

x = \frac{π}{2} + πn, x = \frac{π}{2} + 2 πn

Merge Overlapping Intervals

x = \frac{π}{2} + πn

Graph

Popular Examples

2-csc^2(x)=0

sec(β)=3,(3pi)/2 <β<2pi

cos(x)=(2.9)/(3.2)

cos(θ)sin(θ)-3cos(θ)=0

csc(θ)= 5/3

Frequently Asked Questions (FAQ)

What is the general solution for cot^4(x)=cot^4(x)sin(x) ?
The general solution for cot^4(x)=cot^4(x)sin(x) is x= pi/2+pin