Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
junior college 2 | H2 Maths
One Answer Below
Anyone can contribute an answer, even non-tutors.
Hi cld i get some help ?thank you !!
Date Posted: 4 years ago
Views: 223
See 1 Answer
(1-sin^2(2x))cos3x
By small angle approximation,
=(1-(2x) ^2)(1- (3x)^2/2!)
=(1-4x^2)(1-9/2 x^2)
=1-4.5x^2-4x^2+18x^4
=1-8.5x^2
Replace the equal sign with curly sign for the first and last line of workings
By small angle approximation,
=(1-(2x) ^2)(1- (3x)^2/2!)
=(1-4x^2)(1-9/2 x^2)
=1-4.5x^2-4x^2+18x^4
=1-8.5x^2
Replace the equal sign with curly sign for the first and last line of workings
360 Tutoring Program