If f(x)=/cos x/,then f(3x/4) is Class 12th Mathematics, Question Paper 2023:If f(x)=/cos x/,then f(3x/4) is By Rohit Sharma - March 12, 2023 These are the options for the Question: If f(x)=/cos x/,then f(3x/4) is (a) 1 (b) -1 (c) -1/[2 (d) 1/[2 The correct answer is – (d) 1/[2