Question

How can i verify
cot θ ∙ sec θ = csc θ?

Answer 1

First- stop writing csc, sec, cot and such- it's just confusing- convert immediately to 1/sin,1/cos etc.

Answer 2

and then use either
tan=sin/cos
or
sin^2+cos^2=1

from these 2 formulas you derive most of the stuff in trig

Answer 3

So here,\[\frac{1}{tan}\frac{1}{cos}=\frac{1}{sin}\]
Use tan=sin/cos, and it's obvious

Answer 4

thank you