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The absolute value of the sine function cannot exceed 1 and so sin(a) = 312 is not possible.

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โˆ™ 2017-03-30 19:46:06
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Q: What is angle a when given sin a 312?
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sin312 the terminal angle of 312 is equal to 48 degrees! That's all i know!


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In triangle abc given that angle a equals 57 angle b equals 73 and ab equals 24cm find the length of ac?

The sum of the angles inside a triangle is equal to 180°. We are told that angle a is 57°, and that angle b is 73°. This tells us that angle c is is (180 - 57 - 73)°, or 50°. We are also given the length of side ab, 25cm. With that, we can use the sine rule to calculate the length of side ac: sin(b) / |ac| = sin(c) / |ab| ∴ sin(73°) / |ac| = sin(50°) / 24cm ∴ |ac| = 24cm · sin(73°) / sin(50°) ∴ |ac| ≈ 29.96cm


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