1
Q
sec
A
1/cosx
2
Q
cosec
A
1/sinx
3
Q
cot
A
1/tanx OR cosx/sinx
4
Q
tan
A
sin/lcos
5
Q
sin2a
A
2sinAcosA
6
Q
cos2a
A
2cos^2A-1 OR 1-2sin^2A OR cos^2A-sin^2A
7
Q
1
A
sin^2 + Cos^2
8
Q
sec^2x
A
1+tan^2x
9
Q
cosec^2x
A
1+cot^2x
10
Q
how would you find solutions for
cos to the minus 1 x = -5
A
values in s and t of cast diagram
11
Q
how wouuld u find solutions in
-180< x < 180
A
negative go clockwise on cast
positive go anticlockwise on cast
12
Q
how would u find soloutions of
cos x = - 1/2
cos to the minus 1 = 120
A
solutions in a and c
13
Q
LOOK OUT FOR
1) cos quared - sin squared
2) (cos + sin ) squared
A
1) (cos + sin) (cos - sin)
2) cos squared + 2sincos+ sin squared
14
Q
using r formula, how would you find alpha
A
tan
15
Q
using r formula how would you find R
A
pythagorous
Memorise maths
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