What is the value of -cot((3pi)/4)*csc((3pi)/4) ?

The value of -cot((3pi)/4)*csc((3pi)/4) is square root of 2

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-cot((3pi)/4)*csc((3pi)/4)

- cot (\frac{3 π}{4}) \cdot csc (\frac{3 π}{4})

2

Decimal Notation

1.41421 \dots

Solution steps

- cot (\frac{3 π}{4}) csc (\frac{3 π}{4})

Use the following trivial identity:

cot (\frac{3 π}{4}) = - 1

cot (\frac{3 π}{4})

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

= - 1

Rewrite using trig identities:

csc (\frac{3 π}{4}) = 2

csc (\frac{3 π}{4})

Rewrite using trig identities:

\frac{1}{sin ( \frac{3 π}{4} )}

csc (\frac{3 π}{4})

Use the basic trigonometric identity:

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

= \frac{1}{sin ( \frac{3 π}{4} )}

= \frac{1}{sin ( \frac{3 π}{4} )}

Use the following trivial identity:

sin (\frac{3 π}{4}) = \frac{2}{2}

sin (\frac{3 π}{4})

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}

= \frac{2}{2}

= \frac{1}{\frac{2}{2}}

Simplify

\frac{1}{\frac{2}{2}} : 2

\frac{1}{\frac{2}{2}}

Apply the fraction rule:

\frac{1}{\frac{b}{c}} = \frac{c}{b}

= \frac{2}{2}

Apply radical rule:

2 = 2^{\frac{1}{2}}

= \frac{2}{2 ^{\frac{1}{2}}}

Apply exponent rule:

\frac{x ^{a}}{x ^{b}} = x^{a - b}

\frac{2 ^{1}}{2 ^{\frac{1}{2}}} = 2^{1 - \frac{1}{2}}

= 2^{1 - \frac{1}{2}}

Subtract the numbers:

1 - \frac{1}{2} = \frac{1}{2}

= 2^{\frac{1}{2}}

Apply radical rule:

2^{\frac{1}{2}} = 2

= 2

= 2

= - (- 1) 2

Simplify

= 2

arctan (\frac{1}{42})

3.2 tan (2 3^{\circ})

arctan (\frac{- 7}{2})

sin (\frac{5 π}{7}) cos (\frac{π}{28}) + cos (\frac{5 π}{7}) sin (\frac{π}{28})

5 \cdot cos (3.7 \cdot π)

What is the value of -cot((3pi)/4)*csc((3pi)/4) ?
The value of -cot((3pi)/4)*csc((3pi)/4) is square root of 2