Recent content by ifomoe

Yay! :smile: I think my lecturer said that another name for reduction formula is auxiliary angle formula. If I'm not mistaken.

Thanks! :smile:

Thank you. :smile: Yes. I meant it like that: (1/√2)cos15 - (1/√2)sin15. I used the reduction formula but I just re-did it and got 1/2. Please, don't tell me I'm wrong again. My brain can't handle much more of this. :frown:

Homework Statement 1/\sqrt{}2 cos 15 - 1/\sqrt{}2 sin 15 The Attempt at a Solution I got \sqrt{}3/2. If anyone could confirm this, I would appreciate it. Thanks.

Homework Statement I have been puzzling over this question for hours now. The centre of a wall clock is 180 cm above the floor. The hand of the clock that indicates the seconds is 20 cm long. The height, h cm above the floor, of the tip of the second hand, t seconds after midday, is...