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Cos(-155) = cos(155) = 1 - cos(180-155) = 1-cos(25).
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What is cos of a negative angle?
The cosine function is an even function which means that cos(-x) = cos(x). So, if cos of an angle is positive, then the cos of the negative of that angle is positive and if cos of an angle is negative, then the cos of the negative of that angle is negaitive.
Is the complement of an acute angle an acute angle?
A complement of an acute angle must be an acute angle. An acute angle is an angle whose measure is more than 0 degrees but less than 90 degrees. For example, even if the angle was the minimum 1 degree, the complement is still 89 degrees, which is still acute. Therefore, any combination of a complement of an acute angle MUST be acute.
If an angle measures 60 is it?
An angle of 60 degrees is an acute angle
A shape with one right angle and one acute angle?
an angle with a acute and right angle
What is a name for a 83 degree angle?
It is an acute angle.
Express the function tan 120 degree as function of an acute angle?
- tan 60
Express the function 120 degree as function of an acute angle?
Example: Express sin 120⁰ as a function of an acute angle (an angle between 0⁰ and 90⁰).Solution:Each angle θ whose terminal side lies in quadrant II, III, or IV has associated with it an angle called the reference angle, alpha (alpha is formed by the x-axis and the terminal side).Since 120⁰ lies on the second quadrant, then alpha = 180⁰ - 120⁰ = 60⁰.Since sine is positive in the second quadrant, sin 120⁰ = sin 60⁰.Example: Express tan 320⁰ as a function of an acute angle.Solution:Since 320⁰ lies on the fourth quadrant, then alpha = 360⁰ - 320⁰ = 40⁰.Since tangent is negative in the fourth quadrant, tan 320⁰ = -tan 40⁰.
What are the trigonometric function of an acute angle?
The trigonometric functions are sine, cosine and tangent along with their reciprocals and the inverses. Whether the angle is acute or obtuse (or reflex) makes no difference).
How many acute angles does a acute angle have?
1 acute angle = 1 acute angle
What type of angle is a 154 degree angle?
acute
Sentence with acute?
That is an acute angle. An obtuse angle is not acute.
What is cos of a negative angle?
The cosine function is an even function which means that cos(-x) = cos(x). So, if cos of an angle is positive, then the cos of the negative of that angle is positive and if cos of an angle is negative, then the cos of the negative of that angle is negaitive.
What is a 17 degree angle?
An acute angle
What angle is smaller than a right angle?
acute angle
Does an acute has 17 degrees?
An acute angle is an angle less than 90°. So an angle of 17° is an acute angle.
How many angles does a acute angle have?
An acute angle has one angle.
What type of angle is 35 degrees?
This is an acute angle.
