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chenny1
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cos = sin (pi/2-theta)
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chenny1 said:1. Establish the identity sin(3pi/2-theta) = - cos theta
2. cos = sin (pi/2-theta)
3. sin (3pi/2-theta = - sin (pi/2-theta)
The cosine of π/2 - θ is equal to the sine of θ.
Cosine and sine are trigonometric functions that are closely related. They both describe the ratios of sides of a right triangle to its hypotenuse.
To find the value of cosine π/2 - θ, you can use the cosine function on a calculator or use the identity cos(π/2 - θ) = sin(θ).
Yes, cosine and sine can be equal when the angle θ is equal to 0 or π/2. In all other cases, they will have different values.
The equation cosine = sine (π/2 - θ) is a trigonometric identity that can be used to simplify trigonometric expressions and solve equations involving cosine and sine functions.