Question

Which expression completes the trigonometric identity?

Answer 1

\[\sec \left( \frac{ \pi }{ 2}-0 \right)=\]

Answer 2

@AihberKhan @imqwerty

Answer 3

that equation is undefined

Answer 4

thats not an answer choice

Answer 5

heres a screen shot

Answer 6

Oh it's a theta not a zero!

Just write it out using trig angle formulas

We know sec = 1/cos so

\[\large sec(\frac{\pi}{2} - \theta) = \frac{1}{cos(\frac{\pi}{2} - \theta)}\]

And we know that \(\large cos(\alpha - \beta) = cos(\alpha)cos(\beta) + sin(\alpha)sin(\beta)\) so we just need to expand the bottom and simplify

Answer 7

\[\sec \left( \frac{ \pi }{ 2 }-0 \right)=\csc 0\]

Answer 8

ok i have one more question....can i get some help with it?