Question

given sec theta = sqrt 10 and tan theta =3, determine sin (90 deg-theta)

Answer 1

sin (90 - theta) = cos theta
but I don't know why they give you many information like that, because sec = 1/ cos,
\[\frac {1}{cos\theta}=\sqrt 10\]therefore \[cos\theta= \frac{1}{\sqrt10}\]and nothing to do with tan theta. wonder why and how?

Answer 2

me to im tryna understand it also

Answer 3

is there any question else? relate to this problem?

Answer 4

is this undefined u think

Answer 5

no its a past paper practice quection im practicng for an exam

Answer 6

one of the multiple choice has undefined as one of the answers

Answer 7

it's not undefined.

Answer 8

ohhh

Answer 9

figure out something? I doubt myself

Answer 10

90 is pi/2 not pi friend

Answer 11

oops my bad

Answer 12

read it wrong