Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
|
One Answer Below
Anyone can contribute an answer, even non-tutors.
Urgent. Why the answer for this question is 0 and 360? I just got cos x=0 which is 90 and 270
Date Posted: 4 years ago
Views: 681
See 1 Answer
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Your workings is actually not wrong as u obtained cos x = 0 or cos x = 1.
But u have to reject cos x = 0. This is because sec x = 1/cos x and for
sec x and sec^2 x to be defined, cos x cannot be 0.
Hope this helps and I have provided an alternative approach to solving this using the trigonometric Pythagorean identities.
But u have to reject cos x = 0. This is because sec x = 1/cos x and for
sec x and sec^2 x to be defined, cos x cannot be 0.
Hope this helps and I have provided an alternative approach to solving this using the trigonometric Pythagorean identities.
Date Posted:
4 years ago
360 Tutoring Program