How do you solve sin x = cos (x + 50)?
1 Answer
Nov 6, 2015
Solve sin x = cos (x + 50)
Ans:
Explanation:
Apply the trig identity:
sin x = cos (x + 50) = sin (90 - x - 50) = sin (40 - x)
Check by calculator.
x = 20 --> sin x = 0.34 --> cos (x + 50) = cos 70 = 0.34. OK
