Use the cosine angle addition formula cos(165°) = cos(1° 45°) = cos(1°)cos(45°) sin(1°)sin(45°) = (1/2Multiply with √3 on numerator and denominator cot (θ)=√3/3*√3/√3 cot (θ)=3/3*√3=1/√3 cot (θ)=x/y The coordinates between 0 and π/2 are (1/2, √3/2), (√2/2, √2/2), (√3/2, 1/2) x/y=1/2/√3/2 After solving the above coordinates which will become 1/√3 is angle =1/√3 x/y=1/2/√3/2Ratio \\ Angle θ 0 ° 30 ° 45 ° 60 ° 90 °;
Solved If X 3 2 2 Check Whether X 1x Is Rational Or Irrational Self Study 365