Values of Trigonometric Ratios of Typical Angles – I
Values of Trigonometric Ratios of Typical Angles – I (i) Value of 7½° θ = 7½° then 2θ = 15° [∵ 1-cos2θ = 2sin²θ and sin2θ = 2sinθcosθ]. . . = (√3 – √2) (√2 – 1) (ii) Value of cot 82½ cot 82½° = cos (90° – 7½°) = tan 7½° = (√3 – Read more about Values of Trigonometric Ratios of Typical Angles – I[…]