Help! Determine the angle

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Guest Dec 17, 2014

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In this right triangle, when referring to ∠B, the name given to side a is "adjacent" and the name given to side c is "hypotenuse".

Again referring to ∠B, cos = adjacent/hypotenuse, so: cos(∠B) = a/c ---> cos(∠B) = 5/13.

To find the size of ∠B, use cos^-1 ---> ∠B = cos^-1(5/13) ---> ∠B = 67.38°.

geno3141 Dec 17, 2014

geno3141 · Answer 1 · 2014-12-17T06:15:52

In this right triangle, when referring to ∠B, the name given to side a is "adjacent" and the name given to side c is "hypotenuse".

Again referring to ∠B, cos = adjacent/hypotenuse, so: cos(∠B) = a/c ---> cos(∠B) = 5/13.

To find the size of ∠B, use cos^-1 ---> ∠B = cos^-1(5/13) ---> ∠B = 67.38°.