extra stuff

Question 1

how to find the area of a triangle (non-right angle)

Answer 1

1/2 x A x B x sinc

• half x two of the sides x the angle in-between them

Question 2

how to find speed at a set point with projectiles

Answer 2

you have to use pythagorus
square root the horizontal speed squared plus the vertical speed squared

Question 3

identity of cos2x

Answer 3

cos^2(x)-sin^2(x)

Question 4

identity of cos^2(x)

Answer 4

½(1+cos2x)

Question 5

identity of sin^2(x)

Answer 5

½(1-cos2x)