What is the general solution for 2sin(x)+csc(x)=0 ?

The general solution for 2sin(x)+csc(x)=0 is No Solution for x\in\mathbb{R}

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Popular Trigonometry >

2sin(x)+csc(x)=0

Solution

2 sin (x) + csc (x) = 0

Solution

No Solution for x \in R

Solution steps

2 sin (x) + csc (x) = 0

Rewrite using trig identities

csc (x) + 2 sin (x)

Use the basic trigonometric identity:

sin (x) = \frac{1}{csc ( x )}

= csc (x) + 2 \cdot \frac{1}{csc ( x )}

2 \cdot \frac{1}{csc ( x )} = \frac{2}{csc ( x )}

2 \cdot \frac{1}{csc ( x )}

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{1 \cdot 2}{csc ( x )}

Multiply the numbers:

1 \cdot 2 = 2

= \frac{2}{csc ( x )}

= csc (x) + \frac{2}{csc ( x )}

csc (x) + \frac{2}{csc ( x )} = 0

Solve by substitution

csc (x) + \frac{2}{csc ( x )} = 0

Let:

csc (x) = u

u + \frac{2}{u} = 0

u + \frac{2}{u} = 0 : u = 2 i, u = - 2 i

u + \frac{2}{u} = 0

Multiply both sides by

u

u + \frac{2}{u} = 0

Multiply both sides by

u

uu + \frac{2}{u} u = 0 \cdot u

Simplify

uu + \frac{2}{u} u = 0 \cdot u

Simplify

uu : u^{2}

uu

Apply exponent rule:

a^{b} \cdot a^{c} = a^{b + c}

uu = u^{1 + 1}

= u^{1 + 1}

Add the numbers:

1 + 1 = 2

= u^{2}

Simplify

\frac{2}{u} u : 2

\frac{2}{u} u

Multiply fractions:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{2 u}{u}

Cancel the common factor:

u

= 2

Simplify

0 \cdot u : 0

0 \cdot u

Apply rule

0 \cdot a = 0

= 0

u^{2} + 2 = 0

u^{2} + 2 = 0

u^{2} + 2 = 0

Solve

u^{2} + 2 = 0 : u = 2 i, u = - 2 i

u^{2} + 2 = 0

Move

2

to the right side

u^{2} + 2 = 0

Subtract

2

from both sides

u^{2} + 2 - 2 = 0 - 2

Simplify

u^{2} = - 2

u^{2} = - 2

For

x^{2} = f (a)

the solutions are

x = f (a), - f (a)

u = - 2, u = - - 2

Simplify

- 2 : 2 i

- 2

Apply radical rule:

- a = - 1 a

- 2 = - 1 2

= - 1 2

Apply imaginary number rule:

- 1 = i

= 2 i

Simplify

- - 2 : - 2 i

- - 2

Simplify

- 2 : 2 i

- 2

Apply radical rule:

- a = - 1 a

- 2 = - 1 2

= - 1 2

Apply imaginary number rule:

- 1 = i

= 2 i

= - 2 i

u = 2 i, u = - 2 i

u = 2 i, u = - 2 i

Substitute back

u = csc (x)

csc (x) = 2 i, csc (x) = - 2 i

csc (x) = 2 i, csc (x) = - 2 i

csc (x) = 2 i :

No Solution

csc (x) = 2 i

No Solution

csc (x) = - 2 i :

No Solution

csc (x) = - 2 i

No Solution

Combine all the solutions

No Solution for x \in R

Graph

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Frequently Asked Questions (FAQ)

What is the general solution for 2sin(x)+csc(x)=0 ?
The general solution for 2sin(x)+csc(x)=0 is No Solution for x\in\mathbb{R}