The length of the side AB of the triangle shown is 13 m. 11.27 m. 9.22 m. 8.95 m

Question

The length of the side AB of the triangle shown is 13 m. 11.27 m. 9.22 m. 8.95 m. 6.48 m. The length of the side AB of the right triangle shown is 12.6 m. 11.8 m. 10.5 m. 9.24 m. 8.51 m. The angle theta of the right triangle shown is 35.0 degree. 36.9 degree. 44.4 degree. 45.6 degree. 53.1 degree The angle theta of the triangle shown is 0.785 rad. 0.813 rad. 1.05 rad. 1.57 rad. 3.14 rad. The length of the side AC of the triangle shown is 5.00 in. 5.08 in. 5.32 in 5.53 in. 5.77 in. The term cos^2 theta is equivalent to (1 - sin 2 theta)/2. (1 - cos 2 theta)/2. (1 + sin 2 theta)/2. (1 + cos 2 theta)/2. -sin 2 theta. The expression 1 - sin^2 theta is equivalent to tan^2 theta. sec^2 theta. 1 + cot^2 theta. cos^2 theta - 1

Explanation / Answer

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Q25)

Given AC = 8m

Angle OAB = 70 degree

Since angle OAC = 90 degree

=> Angle BAC = 20 degree

Cos (BAC) = AC/AB

cos (20) = 8 / AB

AB = 8 / 0.939

=8.513

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