Question

Find the value of cos 30 + cos² 45 + cos²60​

Answer 1

Hey buddy

cos30° = √3/2

cos45° = 1/√2

cos 60° = 1/2

putting these values in the question...

cos 30 + cos² 45 + cos²60

√3/2 + (1/√2)² + (1/2)²

√3/2 + 1/2 + 1/4

Taking LCM of denominator,

(2√3 + 2 + 1)/4

(2√3 + 3)/4 ans.