Is 1/(cos(x))-cos(x)=tan(x)sin(x) ?

The answer to whether 1/(cos(x))-cos(x)=tan(x)sin(x) is True

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prove 1/(cos(x))-cos(x)=tan(x)sin(x)

prove

\frac{1}{cos ( x )} - cos (x) = tan (x) sin (x)

True

Solution steps

\frac{1}{cos ( x )} - cos (x) = tan (x) sin (x)

Manipulating right side

tan (x) sin (x)

Express with sin, cos

sin (x) tan (x)

Use the basic trigonometric identity:

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

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

Simplify

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

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

Multiply fractions:

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

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

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

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

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

Rewrite using trig identities

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

Use the Pythagorean identity:

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

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

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

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

Expand

\frac{1 - cos ^{2} ( x )}{cos ( x )} : \frac{1}{cos ( x )} - cos (x)

\frac{1 - cos ^{2} ( x )}{cos ( x )}

Apply the fraction rule:

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

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

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

Cancel

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

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

Cancel the common factor:

cos (x)

= cos (x)

= \frac{1}{cos ( x )} - cos (x)

= - cos (x) + \frac{1}{cos ( x )}

= \frac{1}{cos ( x )} - cos (x)

We showed that the two sides could take the same form

\Rightarrow True

cos (4 5^{\circ} - x) = cos (x - 4 5^{\circ})

\frac{1 - csc ^{2} ( A )}{csc ^{2} ( A )} = - cos^{2} (A)

csc (x) (sec (x)) = tan (x)

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

3 cos^{2} (θ) + sin^{2} (θ) = 3 - 2 sin^{2} (θ)

Is 1/(cos(x))-cos(x)=tan(x)sin(x) ?
The answer to whether 1/(cos(x))-cos(x)=tan(x)sin(x) is True