Is sin(x)+sin(x)*cot^2(x)=csc(x) ?

The answer to whether sin(x)+sin(x)*cot^2(x)=csc(x) is True

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

prove sin(x)+sin(x)*cot^2(x)=csc(x)

prove

sin (x) + sin (x) \cdot cot^{2} (x) = csc (x)

True

Solution steps

sin (x) + sin (x) cot^{2} (x) = csc (x)

Manipulating left side

sin (x) + sin (x) cot^{2} (x)

Express with sin, cos

sin (x) + cot^{2} (x) sin (x)

Use the basic trigonometric identity:

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

= sin (x) + (\frac{cos ( x )}{sin ( x )})^{2} sin (x)

Simplify

sin (x) + (\frac{cos ( x )}{sin ( x )})^{2} sin (x) : \frac{sin ^{2} ( x ) + cos ^{2} ( x )}{sin ( x )}

sin (x) + (\frac{cos ( x )}{sin ( x )})^{2} sin (x)

(\frac{cos ( x )}{sin ( x )})^{2} sin (x) = \frac{cos ^{2} ( x )}{sin ( x )}

(\frac{cos ( x )}{sin ( x )})^{2} sin (x)

(\frac{cos ( x )}{sin ( x )})^{2} = \frac{cos ^{2} ( x )}{sin ^{2} ( x )}

(\frac{cos ( x )}{sin ( x )})^{2}

Apply exponent rule:

(\frac{a}{b})^{c} = \frac{a ^{c}}{b ^{c}}

= \frac{cos ^{2} ( x )}{sin ^{2} ( x )}

= \frac{cos ^{2} ( x )}{sin ^{2} ( x )} sin (x)

Multiply fractions:

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

= \frac{cos ^{2} ( x ) sin ( x )}{sin ^{2} ( x )}

Cancel the common factor:

sin (x)

= \frac{cos ^{2} ( x )}{sin ( x )}

= sin (x) + \frac{cos ^{2} ( x )}{sin ( x )}

Convert element to fraction:

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

= \frac{sin ( x ) sin ( x )}{sin ( x )} + \frac{cos ^{2} ( x )}{sin ( x )}

Since the denominators are equal, combine the fractions:

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

= \frac{sin ( x ) sin ( x ) + cos ^{2} ( x )}{sin ( x )}

sin (x) sin (x) + cos^{2} (x) = sin^{2} (x) + cos^{2} (x)

sin (x) sin (x) + cos^{2} (x)

sin (x) sin (x) = sin^{2} (x)

sin (x) sin (x)

Apply exponent rule:

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

sin (x) sin (x) = sin^{1 + 1} (x)

= sin^{1 + 1} (x)

Add the numbers:

1 + 1 = 2

= sin^{2} (x)

= sin^{2} (x) + cos^{2} (x)

= \frac{sin ^{2} ( x ) + cos ^{2} ( x )}{sin ( x )}

= \frac{sin ^{2} ( x ) + cos ^{2} ( x )}{sin ( x )}

= \frac{cos ^{2} ( x ) + sin ^{2} ( x )}{sin ( x )}

Rewrite using trig identities

\frac{cos ^{2} ( x ) + sin ^{2} ( x )}{sin ( x )}

Use the Pythagorean identity:

cos^{2} (x) + sin^{2} (x) = 1

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

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

Rewrite using trig identities

Use the basic trigonometric identity:

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

\frac{1}{\frac{1}{c s c ( x )}}

Simplify

\frac{1}{\frac{1}{c s c ( x )}}

Apply the fraction rule:

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

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

Apply rule

\frac{a}{1} = a

= csc (x)

csc (x)

csc (x)

We showed that the two sides could take the same form

\Rightarrow True

\frac{1 - cos ^{2} ( θ )}{sin ( θ )} = sin (θ)

1 + sec^{2} (x) \cdot sin^{2} (x) = sec^{2} (x)

cos^{2} (a) + sin^{2} (a) = 1

sin (x) cos (x) = sin (x)

cos (3 x) = cos (x) (cos^{2} (x) - 3 sin^{2} (x))

Is sin(x)+sin(x)*cot^2(x)=csc(x) ?
The answer to whether sin(x)+sin(x)*cot^2(x)=csc(x) is True