Welcome to the course
About the course
Examinations
1. Numerical calculations
1.1 Different types of numbers
1.2 Fractions
1.3 Powers
2. Algebra
2.1 Algebraic expressions
2.2 Linear expressions
2.3 Quadratic expressions
3. Roots and logarithms
3.1 Roots
3.2 Equations with roots
3.3 Logarithms
3.4 Logarithmic equations
4. Trigonometry
4.1 Angles and circles
4.2 Functions
4.3 Relations
4.4 Equations
5. Written mathematics
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Solution 4.3:8d
From Förberedande kurs i matematik 1
Revision as of 08:40, 10 October 2008 by
Tek
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It seems natural to try to use the addition formula on the numerator of the left-hand side,
cos
(
u
+
v
)
cos
u
cos
v
=
cos
u
cos
v
cos
u
cos
v
−
sin
u
sin
v
=
1
−
sin
u
sin
v
cos
u
cos
v
=
1
−
tan
u
tan
v
.
