why is cos (-pi/4) the same as cos (pi/4)?
evaluate tan (2pi/3)
= (3pi/3) - (pi/3)
=(pi) - (pi/3)
=+ tan (pi/3) = (√3)
Is this correct?
year 11 2017
year 12 2018
year boredsatan 2019
year LOL 2020-infinity
why is cos (-pi/4) the same as cos (pi/4)?
year 11 2017
year 12 2018
year boredsatan 2019
year LOL 2020-infinity
HSC 2017: English Adv - Maths Ext 1 - Maths Ext 2 - Chemistry - Physics
ATAR Aim: 97.30
The first four quadrants are positive for cos. (pi/4) is obviously in the first quadrant, and if you can see that (-pi/4) is actually in the fourth quadrant, then both cos(pi/4) and cos(-pi/4) are positive (1/√2). It might not be the best explanation because this is much easier to show with a diagram of the quadrants, but I hope it helps anyway.
HSC 2017: English Adv - Maths Ext 1 - Maths Ext 2 - Chemistry - Physics
ATAR Aim: 97.30
If pr(A) = 0.45, pr(B) = 0.35, and pr(A inverted u B) = 0.25, how would you find Pr (A' inverted u B')
year 11 2017
year 12 2018
year boredsatan 2019
year LOL 2020-infinity
convert 7pi/12 to degrees
(7pi/12)*(180/pi)
=1260pi/12pi
= 105
is this correct?
year 11 2017
year 12 2018
year boredsatan 2019
year LOL 2020-infinity
Anyone know how to work out tan (5pi/4) as i'm really confused?
year 11 2017
year 12 2018
year boredsatan 2019
year LOL 2020-infinity
bump
year 11 2017
year 12 2018
year boredsatan 2019
year LOL 2020-infinity
Free MX1 Notes: http://tinyurl.com/freeMX1notes
B Engineering (I have no idea anymore) @UNSW IV
2016 HSC (Accelerated)
// 2 Unit Maths // Studies of Religion 1 //
2017 HSC
// Biology // Physics // Maths Extension 1 // Maths Extension 2 // English Advanced //
1-on-1 Maths Tutoring(IB & HSC): Epping, Beecroft, Eastwood, Carlingford & Beyond
IB: Maths Studies, Maths SL & Maths HL; HSC: 2U, 3U & 4U
Highly Qualified & Highly Experienced. Estimated ATAR > 9.995
There are IB Maths Tutors and there are IB Maths Tutors.
How would you work out tan (-2pi/3)
I'm confused as it's negative
year 11 2017
year 12 2018
year boredsatan 2019
year LOL 2020-infinity
2016 HSC (Accelerated)
// 2 Unit Maths // Studies of Religion 1 //
2017 HSC
// Biology // Physics // Maths Extension 1 // Maths Extension 2 // English Advanced //
in a population of 10,000 people, 75% spoke german, 45% spoke french, and 10% of the population did not speak either french or german
draw a venn diagram
how do you work out how many people speak both french and german, given that it's not stated above?
year 11 2017
year 12 2018
year boredsatan 2019
year LOL 2020-infinity
bump
year 11 2017
year 12 2018
year boredsatan 2019
year LOL 2020-infinity
solve cos(x) = 0.5, (-4pi to 4pi)
base = pi/3,
+ve rotation
x = pi/3, 2pi-pi/3 = 5pi/3
pi/3 + 2pi = 7pi/3
5pi/3 + 2pi = 11pi/3
-ve rotation
x = -pi/3, x = -2pi + pi/3 = -5pi/3
-2pi - (-pi/3) = -5pi/3
-2pi - (-5pi/3) = -pi/3
are these answers right?
year 11 2017
year 12 2018
year boredsatan 2019
year LOL 2020-infinity
There are currently 1 users browsing this thread. (0 members and 1 guests)
Bookmarks