Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • Evaluate the definite integrals in Exercises 1 to 20. 5 0 to pi/2 cos 2x

Evaluate the definite integrals in Exercises 1 to 20.

    Q5.    \int_0^\frac{\pi}{2}\cos 2x dx

Answers (1)

best_answer

Given integral: \int_0^\frac{\pi}{2}\cos 2x dx

Consider the integral \int \cos 2x dx

\int \cos 2x dx = \frac{\sin 2x }{2}

So, we have the function of x, f(x) = \frac{\sin 2x }{2}

Now, by Second fundamental theorem of calculus, we have

I = f(\frac{\pi}{2})-f(0)

= \frac{1}{2}\left \{ \sin 2(\frac{\pi}{2}) - \sin 0 \right \}

= \frac{1}{2}\left \{ 0 - 0 \right \} = 0

Posted by

Divya Prakash Singh

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE OSM Evaluation Row: Class 12 revised marksheet sparks fresh debate, Vedant disputes board's explanation
anam-khan

After CBSE tender analysis, Sarthak Siddhant launches government procurement portal
anam-khan

CBSE OSM controversy deepens as students allege fresh errors, seek grace marks

Latest Question