Find the General Solution of the Following Equation Cos X = − √ 3 2 CBSE CBSE (Science) Class 11 Textbook Solutions Important Solutions 9 Question Bank Solutions ConceptTherefore, we have obtained the value of cos 135° as √2/2 using the cos3x identity Important Notes on Cos 3x The formula of cos3x is cos3x = 4 cos^3x 3 cos x The derivative of cos3x is 3 secx = 1/ cosx Calculation cosx = √3/2 ⇒ sinx = √1 (√3/2) 2 ⇒ sinx = √ (1 3/4) ⇒ sinx = 1/2 ∵ π < x < 3π/2 and sinx is negative in 3rd quadrant Cotx = cosx/sinx ⇒ cotx = √3
What Are All The Solutions Of The Equation Cos 2x 3 Sin X 1 0 Quora
