1.

Convert the following angles  in radians:(i) 45°(ii) 120°(iii) 135°(iv) 540°

Answer»

∵ 180° = π radians

∴ 1° = π/180° radians

(i) 45 = π/180° x 45° radians

= π/4 radians

(ii) 120° = π/180° x 120° radians

= 2π/3 radians

(iii) 135° = π/180° x 135° radians

= 3π/4 radians

(iv) 540° = π/180° x 540° radians

= 3π radians



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