P2.7 Trig. & Modelling Flashcards
1
Q
sin2A =
A
2sinAcosA
2
Q
cos2A =
A
cos^2A - sin^2A
2cos^2A -1
1-2sin^2A
3
Q
tan2A =
A
2tanA / 1-tan^2A
4
Q
when solving trig. equations with sin & cos…
A
put sin on one side & cos on the other
then divide by cos & constant in front of sin to get tanx =
5
Q
when finding the time for one complete revolution for something defined with a trig. equation…
A
find consecutive times it is at max. height
