Question

cos 60 cos 30 + sin 60 sin 30​

Answer 1

cos 60° = ½

cos 30° = √3/2

sin 60° = √3/2

sin 30° = 1/2

putting these values in question :-

½ × √3/2 + √3/2 × 1/2

= √3/4 + √3/4

= (2√3)/4

= √3/2

cheers

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