amd123 said:Homework Statement
sin (x) + sin (3x) + sin (5x) + sin (7x) = 4cos(x)cos(2x)sin(4x)
Homework Equations
sin(a+b)=sin(a)cos(b)+sin(b)cos(a)
sin(a-b)=sin(a)cos(b)-sin(b)cos(a)
The Attempt at a Solution
Me and four of my classmates have tried to do this proof and it kicked our ***.
Please help.
The "Hardest Identity Evar involving sum and differences" is a mathematical equation that challenges people to find the value of a given expression by using only addition and subtraction.
This identity is considered difficult because it requires a deep understanding of mathematical principles and the ability to manipulate numbers in creative ways. It also involves multiple steps and can be very time-consuming to solve.
Sure, an example of the "Hardest Identity Evar involving sum and differences" is: 7 + 7 - 7 + 7 - 7 + 7 = ?
There are many different strategies that can be used to solve this identity, but one common approach is to group the numbers into pairs and then use the property of additive inverses to simplify the expression.
This identity challenges individuals to think critically and creatively, which are important skills in the study of mathematics. It also helps to strengthen problem-solving abilities and builds a strong foundation for more complex mathematical concepts.