Your answer is B, (t4 - rs5) (t8 + rs5t4 + r2s10)
let me know if you need an explanation :)
Answer:
48
Step-by-step explanation:
The sum of angles of a triangle is 180
<V + <P + <M = 180
47+85+x = 180
132 +x = 180
Subtract 132 from each side
132-132+x = 180-132
x =48
Theres not enough information to properly answer this.
Answer: ![\sin \theta=\frac{-45}{53}](https://tex.z-dn.net/?f=%5Csin%20%5Ctheta%3D%5Cfrac%7B-45%7D%7B53%7D)
Step-by-step explanation:
Since we have given that
![\cos\theta=\frac{28}{53}](https://tex.z-dn.net/?f=%5Ccos%5Ctheta%3D%5Cfrac%7B28%7D%7B53%7D)
And we know that θ is in the Fourth Quadrant.
So, Except cosθ and sec θ, all trigonometric ratios will be negative.
As we know the "Trigonometric Identity":
![\cos^2\theta+\sin^2\theta=1\\\\\sin \theta=\sqrt{1-\cos^2\theta}\\\\\sin \theta=\sqrt{1-(\frac{28}{53})^2}=\sqrt{\frac{53^2-28^2}{53^2}}\\\\\sin \theta=\sqrt{\frac{2025}{53^2}}\\\\\sin \theta=\frac{45}{53}](https://tex.z-dn.net/?f=%5Ccos%5E2%5Ctheta%2B%5Csin%5E2%5Ctheta%3D1%5C%5C%5C%5C%5Csin%20%5Ctheta%3D%5Csqrt%7B1-%5Ccos%5E2%5Ctheta%7D%5C%5C%5C%5C%5Csin%20%5Ctheta%3D%5Csqrt%7B1-%28%5Cfrac%7B28%7D%7B53%7D%29%5E2%7D%3D%5Csqrt%7B%5Cfrac%7B53%5E2-28%5E2%7D%7B53%5E2%7D%7D%5C%5C%5C%5C%5Csin%20%5Ctheta%3D%5Csqrt%7B%5Cfrac%7B2025%7D%7B53%5E2%7D%7D%5C%5C%5C%5C%5Csin%20%5Ctheta%3D%5Cfrac%7B45%7D%7B53%7D)
It must be negative due to its presence in Fourth quadrant.
Hence, ![\sin \theta=\frac{-45}{53}](https://tex.z-dn.net/?f=%5Csin%20%5Ctheta%3D%5Cfrac%7B-45%7D%7B53%7D)