tempeste said:Hi,
the question is
2sin^2 + sinX -1 = 0
I think the next step is then
2(1-cos^2)+cos^2=0
Did I do something wrong because I cannot seem to continue the question?
tempeste said:I still don't really understand...
I tried it marlon's way
2p^2+p-1=0
2p^2+p=1
2p+p=1 (squareroot)
3p=1
p=1/3
Is the right?
Trigonometric identities are mathematical equations that involve the trigonometric functions (sine, cosine, tangent, etc.) and are true for all values of the variables. They are used to simplify and manipulate trigonometric expressions and equations.
A trigonometric identity is an equation that is true for all values of the variables, while a trigonometric equation is an equation that is only true for specific values of the variables. Trigonometric identities are used to prove or simplify equations, while trigonometric equations are used to solve for specific values.
To verify a trigonometric identity, you need to show that it holds true for all values of the variables. This can be done by simplifying both sides of the equation using algebraic manipulations and the properties of trigonometric functions.
Some of the most commonly used trigonometric identities include the Pythagorean identities, double angle identities, half angle identities, and sum and difference identities.
Trigonometric identities have various real-life applications, such as in navigation, engineering, and physics. They are also used in computer graphics and animation to create realistic and accurate 3D images. Additionally, they are used in astronomy to calculate the positions and movements of celestial objects.