Question

tan inverse of 4 by 3 + Cos inverse of 4 by 5 equals to pi by 2 prove that ​

Answer 1

Step-by-step explanation:

tan-1(4/3) + Cos-1(4/5)

tan-1(4/3) + tan-1(3/4)

tan-1 {4/3 + 3/4 / 1 - 4/3 * 3/4 }

tan-1{ (25/12) / 1 - 1 }

tan-1 { 25/12 / 0 }

tan-1 ( infinite)

tan-1{ tan(π/2) }

π/2