Question 5
If 4sin 1 x + cos 1 x = then find the value of x.
4sin 1 x + cos 1 x =
We know that
sin 1 x + cos 1 x = /2
cos 1 x = /2 "sin 1 x"
4sin 1 x + / "sin 1 x" =
4sin 1 x "sin 1 x" = /2
3sin 1 x = /2
sin 1 x = 1/3 /2
sin 1 x = /6
sin 1 x = /6
x = sin /6
x = sin (180 )/6
x = sin 30
x = /

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.