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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


Transcript

Ex 8.2, 1 Evaluate the following : (i) sin 60° cos 30° + sin 30° cos 60° We know that, sin 60° = √3/2 cos 30° = √3/2 sin 30° = 1/2 cos 60° = 1/2 Putting all values sin 60° cos 30° + sin 30° cos 60° = (√𝟑/𝟐)×(√𝟑/𝟐)+(𝟏/𝟐)×(𝟏/𝟐) = (√3 × √3)/(2 × 2)+1/(2 × 2) = 𝟑/𝟒 + 𝟏/𝟒 = (3 + 1)/4 = 4/4 = 1 Hence, sin 60° cos 30° + sin 30° cos 60° = 1

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.