Ex 8.2, 1 (ii) - Chapter 8 Class 10 Introduction to Trignometry
Last updated at April 16, 2024 by Teachoo
Ex 8.2
Ex 8.2, 1 (i)
Ex 8.2, 1 (ii) You are here
Ex 8.2, 1 (iii)
Ex 8.2, 1 (iv) Important
Ex 8.2, 1 (v) Important
Ex 8.2, 2 (i) (MCQ)
Ex 8.2, 2 (ii) (MCQ)
Ex 8.2, 2 (iii) (MCQ) Important
Ex 8.2, 2 (iv) (MCQ)
Ex 8.2, 3 Important
Ex 8.2, 4 (i) Important
Ex 8.2, 4 (ii) Important
Ex 8.2, 4 (iii)
Ex 8.2, 4 (iv)
Ex 8.2, 4 (v) Important
Transcript
Ex 8.2, 1 Evaluate the following : (ii) 2 tan2 45° + cos2 30° – sin2 60° We know that, tan 45° = 1 cos 30° = √3/2 sin 60° = √3/2 Putting all values 2tan 2 45° + cos2 30° -= sin2 60° = 2 ×(𝟏)𝟐+(√𝟑/𝟐)^𝟐−(√𝟑/𝟐)^𝟐 = 2 + 0 = 2
