Trigonometric function·· 1. If the minute hand of the clock is set forward 30 minutes, the number of radians the clock turns is If f '(x) = sin1 / 4x + cos 1 / 4x, then the distance between any two adjacent zeros of F' (x) is 3, the function f (x) = acosx + 2x is odd= It's a concrete process··

Trigonometric function·· 1. If the minute hand of the clock is set forward 30 minutes, the number of radians the clock turns is If f '(x) = sin1 / 4x + cos 1 / 4x, then the distance between any two adjacent zeros of F' (x) is 3, the function f (x) = acosx + 2x is odd= It's a concrete process··

1. A turn of the clock is 12 hours, 360 degrees, so an hour is 30 degrees, 30 minutes is half an hour, 15 degrees. 2. F '(x) = sin1 / 4x + cos1 / 4x = √ 2 * sin (1 / 4 * x + Π / 4), we can see that f' (x) is a periodic function, the period is 8 Π, but the distance between the two adjacent zeros of SiNx is half