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Popular >

tan(θ)=1\land cos(θ)>0,csc(θ)

Solution

tan (θ) = 1 and cos (θ) > 0, csc (θ)

Solution

θ = \frac{π}{4} + πn

+1

Decimal Notation

θ = 0.78539 \dots + πn

Solution steps

tan (θ) = 1 and cos (θ) > 0

tan (θ) = 1 : θ = \frac{π}{4} + πn

tan (θ) = 1

General solutions for

tan (θ) = 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}

θ = \frac{π}{4} + πn

θ = \frac{π}{4} + πn

cos (θ) > 0 : - \frac{π}{2} + 2 πn < θ < \frac{π}{2} + 2 πn

cos (θ) > 0

For

cos (x) > a

, if

- 1 \leq a < 1

then

- arccos (a) + 2 πn < x < arccos (a) + 2 πn

- arccos (0) + 2 πn < θ < arccos (0) + 2 πn

Simplify

- arccos (0) : - \frac{π}{2}

- arccos (0)

Use the following trivial identity:

arccos (0) = \frac{π}{2}

x - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 arccos (x) π \frac{5 π}{6} \frac{3 π}{4} \frac{2 π}{3} \frac{π}{2} \frac{π}{3} \frac{π}{4} \frac{π}{6} 0 arccos (x) 18 0^{\circ} 15 0^{\circ} 13 5^{\circ} 12 0^{\circ} 9 0^{\circ} 6 0^{\circ} 4 5^{\circ} 3 0^{\circ} 0^{\circ}

= - \frac{π}{2}

Simplify

arccos (0) : \frac{π}{2}

arccos (0)

Use the following trivial identity:

arccos (0) = \frac{π}{2}

x - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2} 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 arccos (x) π \frac{5 π}{6} \frac{3 π}{4} \frac{2 π}{3} \frac{π}{2} \frac{π}{3} \frac{π}{4} \frac{π}{6} 0 arccos (x) 18 0^{\circ} 15 0^{\circ} 13 5^{\circ} 12 0^{\circ} 9 0^{\circ} 6 0^{\circ} 4 5^{\circ} 3 0^{\circ} 0^{\circ}

= \frac{π}{2}

- \frac{π}{2} + 2 πn < θ < \frac{π}{2} + 2 πn

Combine the intervals

θ = \frac{π}{4} + πn and - \frac{π}{2} + 2 πn < θ < \frac{π}{2} + 2 πn

Merge Overlapping Intervals

θ = \frac{π}{4} + πn

Popular Examples

- 1 < sin (x) \leq 0

tan(θ)= 1/3 \land sin(θ)<0

tan (θ) = \frac{1}{3} and sin (θ) < 0

cot(θ)=2\land sec(θ)>= 0

cot (θ) = 2 and sec (θ) \geq 0

sin(θ)=-(sqrt(3))/2 \land cos(θ)>= 0

sin (θ) = - \frac{3}{2} and cos (θ) \geq 0

-1<= (pi(cos(x)-sin(x)))/(4sqrt(2))<= 1

- 1 \leq \frac{π ( cos ( x ) - sin ( x ) )}{4 2} \leq 1