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Can you use trig if there is no right angle? - Answers

The trigonometric ratios, as in: sin = opposite/hypotenuse cos = adjacent/hypotenuse tan = opposite/adjacent = sin/cos cannot not still be used as there is no hypotenuse. However, other trigonometric formulae can still be used: for example in a triangle where side a is opposite angle A, etc, the sine rule: sin A/a = sin B/b = sin C/c = 1/2R or the cosine rule: a2 = b2 + c2 - 2 b c cos A (which becomes Pythagoras when angle A is a right angle since COS 90o = 0) are always valid.



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Can you use trig if there is no right angle? - Answers

https://math.answers.com/math-and-arithmetic/Can_you_use_trig_if_there_is_no_right_angle

The trigonometric ratios, as in: sin = opposite/hypotenuse cos = adjacent/hypotenuse tan = opposite/adjacent = sin/cos cannot not still be used as there is no hypotenuse. However, other trigonometric formulae can still be used: for example in a triangle where side a is opposite angle A, etc, the sine rule: sin A/a = sin B/b = sin C/c = 1/2R or the cosine rule: a2 = b2 + c2 - 2 b c cos A (which becomes Pythagoras when angle A is a right angle since COS 90o = 0) are always valid.



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https://math.answers.com/math-and-arithmetic/Can_you_use_trig_if_there_is_no_right_angle

Can you use trig if there is no right angle? - Answers

The trigonometric ratios, as in: sin = opposite/hypotenuse cos = adjacent/hypotenuse tan = opposite/adjacent = sin/cos cannot not still be used as there is no hypotenuse. However, other trigonometric formulae can still be used: for example in a triangle where side a is opposite angle A, etc, the sine rule: sin A/a = sin B/b = sin C/c = 1/2R or the cosine rule: a2 = b2 + c2 - 2 b c cos A (which becomes Pythagoras when angle A is a right angle since COS 90o = 0) are always valid.

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      The trigonometric ratios, as in: sin = opposite/hypotenuse cos = adjacent/hypotenuse tan = opposite/adjacent = sin/cos cannot not still be used as there is no hypotenuse. However, other trigonometric formulae can still be used: for example in a triangle where side a is opposite angle A, etc, the sine rule: sin A/a = sin B/b = sin C/c = 1/2R or the cosine rule: a2 = b2 + c2 - 2 b c cos A (which becomes Pythagoras when angle A is a right angle since COS 90o = 0) are always valid.

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