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\nUsing co function identities find the value of an angle\n

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\n\nPublisher:\n\nBrian McLogan\n\n\n
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\n👉 Learn how to evaluate trigonometric functions using trigonometric identities. Trigonometric identities are equalities that involve trigonometric functions. We will focus on the cofunction identities and even-odd identities. The...\n👉 Learn how to evaluate trigonometric functions using trigonometric identities. Trigonometric identities are equalities that involve trigonometric functions. We will focus on the cofunction identities and even-odd identities. The cofunction identities property states that the value of the trigonometric function of an angle is equal to the value of the cofunction of the complement of the angle. The cofunctions are sine and cosine, tangent and cotangent, cosecant and secant. For example: sin (90 - x) = cos x; tan (90 - x) = cot x, etc The even/odd identities are trigonometric identities used to evaluate negative angles of even or odd trigonometric functions. Note that for odd functions: f(-x) = -f(x) and for even functions f(-x) = f(x). Sine and tangent with their reciprocal functions are odd, while cosine with its reciprocal function are even. Thus, sin(-x) = -sin x; cos(-x) = cos x, etc. Other very important trigonometric identities are: tan x = sin x / cos x and cot x = cos x / sin x. With the knowledge of these identities, we can evaluate the trigonometric functions of angles given the value of the trigonometric functions of other (necessary) angles.\n
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Resource Details

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Educator Rating
Not yet Rated
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Media Length
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4:18
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Grade
12th - Higher Ed
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Subjects
Math
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Media Type
Instructional Videos
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Source:
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\nBrian McLogan\n\n
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Date
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2012
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Language
English
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Audiences
For Teacher Use
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Usage Permissions
Fine Print: Educational Use
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Concepts

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unit circle, sine, cosine, cosecant, secant, tangent, cotangent, work
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