Question

Can someone help me PLS

Answer 1

Explanation:

2^2=1.75^2+3^2-2*3*1.75cos x

4=3.0625+9-10.5 cosx

10.5cos x=9-4+3.0625

10.5cosx=8.0625

cos x= 8.0625/10.5≈0.77

x≈40 degrees

Answer 2

Answer: D) 40 degrees

Explanation:

Let A = θ

then a = 2 b = 3 c = 1.75

Use the Law of Cosines:

a² = b² + c² - 2bc · cos A

2² = 3² + 1.75² - 2(3)(1.75) · cos θ

4 = 9 + 3.0625 - 10.5 cos θ

4 = 12.0625 - 10.5 cos θ

-8.0625 = -10.5 cos θ

`(-8.0625)/(-10.5)=\cos \theta\\\\\\\cos^(-1)\bigg((-8.0625)/(-10.5)\bigg)=\theta\\\\\\\large\boxed{39.838=\theta}`