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Brilliant_brown [7]
3 years ago
7

Sin400°= 1. sin40° 2. -sin40° 3. sin(-40)°

Mathematics
1 answer:
LenaWriter [7]3 years ago
4 0

Answer:

sin(40°)

Step-by-step explanation:

Trigonometric functions such as sine, cosine, tangent whose short forms are sin, cos, tan respectively are <u><em>repetitive functions</em></u> which repeat itself after every integral multiple of 2π radian or 360°. It means if you add or subtract 360° from any input of  trigonometric function the output of the function won't change.

It means sin(θ) = sin(θ - n×360°) = sin(θ + n×360°)

similarly cos(θ) = cos(θ - n×360°) = cos(θ + n×360°)

and tan(θ) = tan(θ - n×360°) = tan(θ + n×360°)

where n is an integer.

So, by this sin(400°) = sin(400° - 360°) = sin(40°)

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