Idiophone means an instrument that will produce a sound when being struck.
so the answer is B.
Answer:
(-1, 7)
Step-by-step explanation:
We'll use the midpoint formula: ([x₁ + x₂]/2, [y₁ + y₂]/2)
x₁ = -4
x₂ = 2
y₁ = 6
y₂ = 8
Our equation will look like this
([-4 + 2]/2, [6 + 8]/2)
( -2/2, 14/2 )
(-1, 7)
If u= (u1,u2,u3) andv= (v1,v2,v3), then the dot product of u and v is u·v=u1v1+u2v2+u3v3. For instance, the dot product of u=i−2j−3kandv= 2j−kisu·v= 1·0 + (−2)·2 + (−3)(−1) =−1.
Properties of the Dot Product.
Let u,v, and w be three vectors and let c be a real number. Then u·v=v·u,(u+v)·w=u·w+v·w,(cu)·v=c(u·v).
Further, u·u=|u|2.
Thus, if u=0is the zerovector, then u·u= 0, and otherwise u·u>0.1
Orthogonality Two vectors u and v are said to be orthogonal(perpendicular), if the angle between them is 90◦.Theorem. Two vectors u and v are orthogonal if and only if u·v= 0.
Answer:
Step-by-step explanation:
<em>OR</em>
Information on trigonometric ratios
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