Answer:
the answer is -5x + -8x-5/2x^2-3
Step-by-step explanation:
:)
4y^2+4x+1-4y^2+2
4y+1+2
4y+3
Cosθ is 3/5 because the cosine is found from the adjacent side of the triangle being divided by the hypotenuse. The sine is found by putting the opposite side from θ over the hypotenuse. If you draw this triangle out, the side across from θ would be 4 and the hypotenuse 5. In order to find the opposite side, you could either solve with the pythagorean theorem (a^2+b^2= c^2) or you could remember the properties of a triangle, therefore the final side is 3. You then put the opposite, 3, over the hypotenuse,5, in order to get 3/5 for the cosθ.
The answer is 25!
3 times 7 = 21 + 4 = 25
