Math Chapter Wise Trigonometrical Identities And Circular Function English MCQ KVS PGT 2023 Q.Solution of the trigonometric equation 5 cos2 x + 7 sin2 x - 6 = 0 is: Anπ + 4 π Bnπ - 4 π C4/π Dnπ ± 4 π Show answer Correct answer: nπ ± 4 π