Skip to content

VidhyaKosh

Free tests JEE Main Blog Pricing

Log in Start practising

Free tests JEE Main Blog Pricing Log in Start practising

Home
Questions
Mathematics
VK-035383

NDA 2019 Mathematics question

Mathematics Trigonometric Ratio and Identities NDA 2019

If , then what is equal to?

(A)
(B)
(C)Correct
(D)

Answer: (C)

Solution

Squaring: , so . Then .

Question ID VK-035383

VidhyaKosh

Previous-year JEE and NEET questions with worked solutions, timed mock tests, and analytics that tell you which chapter to fix next.

Practise

Free mock tests Build your own test Dashboard Pricing

Browse

All questions JEE Main Physics Chemistry Mathematics

More

About Blog Student login Admin

Built in India for students preparing for JEE and NEET.

© 2026 VidhyaKosh