Question

using trignometric function of 45° and 30° find sin75°

Answer 1

heya...!!!


we know that:-

sin(a + b) = sina×cosb + cosa×sinb


sin(75) = sin(30 + 45)

=> sin30×cos45 + cos30sin45

=> √3/2×1/√2 + 1/2 ×1/√2

=> √3/2√2 + 1/2√2

=> (√3 + 1)/2√2