Shiekh Mohamad Farhan's answer to Katherine Nielson's Secondary 4 E Maths question.
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Use the identities "cos^2 (x) + sin^2 (x) =1" and
"cos (2x) = 2 cos^2 (x) +1"
"cos (2x) = 2 cos^2 (x) +1"
Date Posted:
7 years ago
Possible to offer a step-by-step solution? I still can't seem to simplify it using the identities given. thanks
360 Tutoring Program