Question

Find the exact value of sec 5pi/4.

Answer 1

what's the definition of sec ?
what's the reciprocal of sec ?

Answer 2

opposite tan adjacent

hypotenuse/ adjacent

Answer 3

nice right
but i was asking reciprocal
like sin = 1/csc and csc = 1/sin
so sec = ?

Answer 4

1/cosθ

Answer 5

right now we can use unit circle to find EXACT value of cos at 5pi/4 angle

Answer 6

cos is what at 5pi/4
remember (x,y) ordered pair
where x-coordinate represent `cos theta`
and y-coordinate represent sin tehta

Answer 7

dont understand

Answer 8

hmm okay :=))
so do you know how to find exact value by looking at the unit circle ???
here is an example
if i have to find sin pi/4 then
sqrt{2}/2 is an exact value of sin pi/4