Is sec^2(x)= 1/(cos^2(x)) ?

The answer to whether sec^2(x)= 1/(cos^2(x)) is True

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prove sec^2(x)= 1/(cos^2(x))

prove

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

True

Solution steps

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

Manipulating left side

sec^{2} (x)

Express with sin, cos

sec^{2} (x)

Use the basic trigonometric identity:

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

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

Simplify

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

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

Apply exponent rule:

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

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

Apply rule

1^{a} = 1

1^{2} = 1

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

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

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

We showed that the two sides could take the same form

\Rightarrow True

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

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

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

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

tan (u) - sec (u) = - \frac{cos ( u )}{1 + sin ( u )}

Is sec^2(x)= 1/(cos^2(x)) ?
The answer to whether sec^2(x)= 1/(cos^2(x)) is True