Math  /  Calculus

Question2. The integral sin(x)sin(3x)dx\int \sin (x) \sin (3 x) d x can be solved by trigonometric identity: a. sin(2x)+sin(4x)2\frac{\sin (-2 x)+\sin (4 x)}{2} b. cos(2x)cos(4x)2\frac{\cos (2 x)-\cos (4 x)}{2} c. sin(2x)sin(4x)2\frac{\sin (-2 x)-\sin (4 x)}{2} d. None

Studdy Solution
اجمع النتائج:
=12(12sin(2x)14sin(4x))= \frac{1}{2} \left( \frac{1}{2} \sin(2x) - \frac{1}{4} \sin(4x) \right)
=14sin(2x)18sin(4x)= \frac{1}{4} \sin(2x) - \frac{1}{8} \sin(4x)
وبما أن الخيار (b) هو cos(2x)cos(4x)2\frac{\cos (2 x)-\cos (4 x)}{2}، فإن الإجابة الصحيحة هي (d) لا شيء.

View Full Solution - Free
Was this helpful?

Studdy solves anything!

banner

Start learning now

Download Studdy AI Tutor now. Learn with ease and get all help you need to be successful at school.

ParentsInfluencer programContactPolicyTerms
TwitterInstagramFacebookTikTokDiscord