What is the general solution for sin(x+pi/6)=-1 ?

The general solution for sin(x+pi/6)=-1 is x=2pin+(4pi)/3

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Popular Trigonometry >

sin(x+pi/6)=-1

Solution

sin (x + \frac{π}{6}) = - 1

Solution

x = 2 πn + \frac{4 π}{3}

Degrees

x = 24 0^{\circ} + 36 0^{\circ} n

Solution steps

sin (x + \frac{π}{6}) = - 1

General solutions for

sin (x + \frac{π}{6}) = - 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}{6} = \frac{3 π}{2} + 2 πn

x + \frac{π}{6} = \frac{3 π}{2} + 2 πn

Solve

x + \frac{π}{6} = \frac{3 π}{2} + 2 πn : x = 2 πn + \frac{4 π}{3}

x + \frac{π}{6} = \frac{3 π}{2} + 2 πn

Move

\frac{π}{6}

to the right side

x + \frac{π}{6} = \frac{3 π}{2} + 2 πn

Subtract

\frac{π}{6}

from both sides

x + \frac{π}{6} - \frac{π}{6} = \frac{3 π}{2} + 2 πn - \frac{π}{6}

Simplify

x + \frac{π}{6} - \frac{π}{6} = \frac{3 π}{2} + 2 πn - \frac{π}{6}

Simplify

x + \frac{π}{6} - \frac{π}{6} : x

x + \frac{π}{6} - \frac{π}{6}

Add similar elements:

\frac{π}{6} - \frac{π}{6} = 0

= x

Simplify

\frac{3 π}{2} + 2 πn - \frac{π}{6} : 2 πn + \frac{4 π}{3}

\frac{3 π}{2} + 2 πn - \frac{π}{6}

Group like terms

= 2 πn - \frac{π}{6} + \frac{3 π}{2}

Least Common Multiplier of

6, 2 : 6

6, 2

Least Common Multiplier (LCM)

Prime factorization of

6 : 2 \cdot 3

6

6

divides by

26 = 3 \cdot 2

= 2 \cdot 3

2, 3

are all prime numbers, therefore no further factorization is possible

= 2 \cdot 3

Prime factorization of

2 : 2

2

2

is a prime number, therefore no factorization is possible

= 2

Multiply each factor the greatest number of times it occurs in either

6

2

= 2 \cdot 3

Multiply the numbers:

2 \cdot 3 = 6

= 6

Adjust Fractions based on the LCM

Multiply each numerator by the same amount needed to multiply its

corresponding denominator to turn it into the LCM

6

For

\frac{3 π}{2} :

multiply the denominator and numerator by

3

\frac{3 π}{2} = \frac{3 π 3}{2 \cdot 3} = \frac{9 π}{6}

= - \frac{π}{6} + \frac{9 π}{6}

Since the denominators are equal, combine the fractions:

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

= \frac{- π + 9 π}{6}

Add similar elements:

- π + 9 π = 8 π

= \frac{8 π}{6}

Cancel the common factor:

2

= 2 πn + \frac{4 π}{3}

x = 2 πn + \frac{4 π}{3}

x = 2 πn + \frac{4 π}{3}

x = 2 πn + \frac{4 π}{3}

x = 2 πn + \frac{4 π}{3}

Graph

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Frequently Asked Questions (FAQ)

What is the general solution for sin(x+pi/6)=-1 ?
The general solution for sin(x+pi/6)=-1 is x=2pin+(4pi)/3