What is ln(-1/(cos(x))) ?

The solution to ln(-1/(cos(x))) is ln(-sec(x))

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simplify ln(-1/(cos(x)))

simplify

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

ln (- sec (x))

Solution steps

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

Use the basic trigonometric identity:

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

= ln (- sec (x))

sin^{2} (9 0^{\circ} + a)

- 4.5 cos (3 x - \frac{π}{8})

cos (\frac{π}{2} + φ)

cos (9 0^{\circ}) + cos (- 2 A)

sec (arccos (\frac{u}{v}))