General Thoughts: Mathematics Extension 1 (3 Viewers)

spatula232

Active Member
Joined
Jul 18, 2013
Messages
348
Location
Mars One
Gender
Male
HSC
2015
I got cot13 and cot15 in the 3D trig Q. THERE'S NO COT ON THE BLOODY CALCULATOR!! HOW CAN I POSSIBLY DO THAT?!?
 

Sarthakgarg

New Member
Joined
Feb 15, 2014
Messages
19
Gender
Male
HSC
2015
For the projectile question (14aii), I equated x = vtcos(theta) and x = (v^2sin2(theta))/g, as they both equal x.

Then, simplifying on both sides, I get theta = sin-1 (1/√3)
 

luhanbby

Member
Joined
Aug 16, 2014
Messages
53
Gender
Female
HSC
2015
hey guys if I got 59/70 is that a band 5? I also wrote root(11/4) for the n value idk if they'll take a mark off for not simplifying to root(11) / 2


Sent from my iPhone using Tapatalk
 

thomasdo1

Member
Joined
May 21, 2014
Messages
70
Gender
Male
HSC
2016
hey guys if I got 59/70 is that a band 5? I also wrote root(11/4) for the n value idk if they'll take a mark off for not simplifying to root(11) / 2


Sent from my iPhone using Tapatalk
def b6 m8

I marked myself, fml I got 66/70

I did the 3d trig in radians LOL
 

eccentricity

New Member
Joined
Jan 18, 2015
Messages
10
Gender
Male
HSC
2015
Hey guys, for the projectile motion question, are we supposed to write pi/6 or 5pi/6 if it asks for the angle that the particle makes with the horizontal?
 

Users Who Are Viewing This Thread (Users: 0, Guests: 3)

Top