What is the general solution for cos(t)+sin(t)=0 ?

The general solution for cos(t)+sin(t)=0 is t=(3pi)/4+pin

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cos(t)+sin(t)=0

cos (t) + sin (t) = 0

t = \frac{3 π}{4} + πn

Degrees

t = 13 5^{\circ} + 18 0^{\circ} n

Solution steps

cos (t) + sin (t) = 0

Rewrite using trig identities

cos (t) + sin (t) = 0

Divide both sides by

cos (t), cos (t) \neq = 0

\frac{cos ( t ) + sin ( t )}{cos ( t )} = \frac{0}{cos ( t )}

Simplify

1 + \frac{sin ( t )}{cos ( t )} = 0

Use the basic trigonometric identity:

\frac{sin ( x )}{cos ( x )} = tan (x)

1 + tan (t) = 0

1 + tan (t) = 0

Move

1

to the right side

1 + tan (t) = 0

Subtract

1

from both sides

1 + tan (t) - 1 = 0 - 1

Simplify

tan (t) = - 1

tan (t) = - 1

General solutions for

tan (t) = - 1

tan (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} tan (x) 0 \frac{3}{3} 13 \pm \infty - 3 - 1 - \frac{3}{3}

t = \frac{3 π}{4} + πn

t = \frac{3 π}{4} + πn

cos (C) = 0.87

4 cot (x) + 3 = - 1

cos (\frac{θ}{2}) - cos (θ) = 1

cot (θ) = \frac{4}{3}

0 = sin (x) - cos (x)

What is the general solution for cos(t)+sin(t)=0 ?
The general solution for cos(t)+sin(t)=0 is t=(3pi)/4+pin