Q25Long answer
If θ lies in the first quadrant and cosθ = , then find the value of cos (30° + θ) + cos (45° – θ) + cos (120° – θ). π 3π 5π 7π
If θ lies in the first quadrant and cosθ = , then find the value of cos (30° + θ) + cos (45° – θ) + cos (120° – θ). π 3π 5π 7π