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The answer depends on which of the three angles 'a' is!

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Q: What is the cos of angle 'a' with the measurements 5 13 12?
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What is the cos of angle a if the opposite is 5 the adjacent is 12 and the hypotenuse is 13?

It is: cos^-1(12/13) = 22.61986495 degrees


What is the cos of angle a 5 13 12?

It is: cos = adj/hyp and the acute angles for the given right angle triangle are 67.38 degrees and 22.62 degrees


What is cos of angle a with a hypotenuse of 13 and adjacent of 5 and a opposite of 12?

It is about 67 degrees


What is the complement of an angle whose measure is 13 degrees?

The complement of an acute angle A is the angle 90° - A. The complement of 13° is 77°.


What is the sin of angle A 5 13 12?

The dimensions given fits that of a right angle triangle and sin^-1(12/13) = 67.38 degrees


What is the length of missing side b in the triangle 7cm and 13 cm?

It might be pythagoras therom but it can only be Pythagoras when the traingle has a right angle. If it does then try to work it out using phythagoras. If the angle between the given sides is B, then: b2 = a2 + c2 - 2ac cos B ⇒ b2 = (7 cm)2 + (13 cm)2 - 2 x 7 cm x 13 cm x cos B ⇒ b = √(218 - 182 cos B) cm If it is a right angle triangle, with B the right angle, cos B = cos 90o = 0 and this becomes Pythagoras making the side: b = √218 cm ≈ 14.76 cm If there is a right angle, not between the 7 cm and 13 cm, then the 13cm side is the hypotenuse (as the hypotenuse must be the longest side) and the other side is: b = √(132 - 72) cm = √120 cm ≈ 10.95 cm


Does 51213 form a right angle?

If you mean 5 by 12 by 13 then they will form a right angle triangle


What is the exact ratio of all 6 trig functions when p is a point on a circle at 5 -12?

sin = -12/13 cos = 5/12 tan = -5/12 cosec = -13/12 sec = 12/5 cotan = -12/5


What is the measurement of angle B in the triangle when the hypotenuse is 13 the opposite side is 12 and the adjacent side is 5?

You have not indicated which side the angle is opposite of. Can us law of cosines then by calling sides c and a. b^2 = a^2 + c^2 - 2(a)(c) cos(B) I would arbitrarily have to assign values you have not given me.


How do you calculate cos squared theta equals one minus twelve thirteenths squared?

Writing x instead of theta, cos2x = 1 - (12/13)2 = 1 - 144/169 = 25/169 = (5/13)2 So cos(x) = ± 5/13 so that x = cos-1(5/13) or cos-1(-5/13) And then, depending on the range of x, you have solutions for x. A calculator will only give you the principal solutions, though.


What Angle A of triangle SAM is a right angle. If SM 13 mm and MA 12 mm determine the length of segment SA.?

If the right angle is at A then SA = 5 mm.


What is the sin of angle a if bc is 5 ba is 13 and ca is 12?

5/13 = 0.3846 (to 4 dp)