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What is the sine of 30 degrees?
0.5
What is the cosine of 180 degrees?
-1
What is the tangent of 60 degrees?
sqrt(3)
What is the range of the sine function?
[-1,1]
What is the relationship between the angles in a right triangle?
The sum of the angles in a right triangle is 90 degrees for the right angle plus the other two angles, which sum to 90 degrees.
How can you use factoring to simplify rational expressions?
Factor the numerator and denominator to see if any of the terms can cancel one another out.
Two angles of a triangle are 50° and 30°. Find the third angle.
100°
Is a binomial coefficient always a whole number? Yes or No?
Yes. Just as the number of combinations must always be a whole number, a binomial coefficient will always be a whole number.
Two angles of a triangle are 40° and 70°. Find the third angle.
70°
When we see at a lower level from the horizontal line, then what is the angle formed called as?
Angle of Depression
Every number will have two square roots. What is the principal square root?
The principal square root is the nonnegative root of the number.
If the graph of a polynomial just touches the x-axis and then changes direction, what can we conclude about the factored form of the polynomial?
There will be a factor raised to an even power.
What is the primary function of trigonometry?
Sine function, Cosine function and Tangent Function.
What are the SIX fundamental ratios of Trigonometry?
Sine(sin), Cosine(cos), Tangent(tan), Secant(sec), Cosecant(cosec) and Cotangent(cot).
Who is the founder of trigonometry?
A greek astronomer, geographer and mathematician, Hipparchus discovered the concept of trigonometry.
What is the cosine of 60 degrees?
1/2
How do you convert radians to degrees?
Multiply by 180/n
What is the sine of 45 degrees?
Sqrt(2)
How do you use the unit circle to find the cosine of 30 degree?
You can refer to the coordinates of the point on the unit circle at 30 degrees. The cosine of 30 degrees is sqrt(3)/2.
You can multiply polynomials with any number of terms and any number of variables using four basic steps until you reach the expanded polynomial. What are the four steps?
The distributive property, multiply, combine like terms, and simplify.
What is the period of the sine function?
2n
How do you determine if two triangles are similar using trigonometry?
If the corresponding angles of two triangles are equal, the triangles are similar.
What is the difference between radian and a degree?
A radian is based on the radius of a circle, while a degree is a division of a circle into 360 parts.
What is the fundamental period of the tangent function?
N
How do you find the amplitude of a sinusoidal function?
The amplitude is the absolute value of the coefficient in front of the sine or cosine function.