CBSE Class 10 Sample Paper for 2022 Boards - Maths Basic [MCQ]

CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard →
Class 10
Solutions of Sample Papers for Class 10 Boards

Question 27 - CBSE Class 10 Sample Paper for 2022 Boards - Maths Basic [MCQ] - Solutions of Sample Papers for Class 10 Boards

Last updated at Dec. 16, 2024 by

If x = 2sin 2 𝜃  and y = 2 cos 2 𝜃  + 1 then x + y is

(a) 3   (b) 2   (c) 1   (d)1/2

Slide47.jpeg

Share on WhatsApp

Transcript

Question 27 If x = 2sin2𝜃 and y = 2 cos2𝜃 + 1 then x + y is (a) 3 (b) 2 (c) 1 (d)1/2 Now, x + y = 2sin2 𝜃 + (2 cos2 𝜃 + 1) = (2sin2 𝜃 + 2cos2 𝜃) + 1 = 2(sin2 𝜃 + cos2 𝜃) + 1 Putting sin2 𝜃 + cos2 𝜃 = 1 = 2 × 1 + 1 = 2 + 1 = 3 So, the correct answer is (a)

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo