CBSE Class 10 Sample Paper for 2026 Boards - Maths Basic

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Question 25 (A) - CBSE Class 10 Sample Paper for 2026 Boards - Maths Basic - Solutions of Sample Papers for Class 10 Boards

Last updated at Sept. 10, 2025 by

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Question 25 (A) Evaluate: 2 sin 30° tan 60° − 3 cos2 60° sec2 30°We know that, sin 30° = 1/2 tan 60° =√3 cos 60° = 1/2 sec 30° = 1/cos⁡〖30° 〗 =1/(√3/2)=2/√3 Putting all values 2 sin 30° tan 60° − 3 cos2 60° sec2 30° = 𝟐 ×𝟏/𝟐×√𝟑−𝟑 × (𝟏/𝟐)^𝟐×(𝟐/√𝟑)^𝟐 = √3−3 ×1/4×4/3 = √𝟑−𝟏

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 15 years. He provides courses for Maths, Science and Computer Science at Teachoo