3∅ can be rewritten as (2∅+∅)
sin(3∅) = sin(2∅ + ∅<span>)
Opening brackets on the right hand side;
= sin2</span>∅ cos ∅ + cos2∅sin<span>∅
</span><span>This simplifies to;
= 2sin</span>∅cos^2∅ + sin∅ (1- 2sin^2∅<span>)
= sin</span>∅ (2cos^2∅ + 1 - 2sin^2∅<span>)
= sin</span>∅ (2(1 - sin^2∅) +1-2sin^2∅<span>)
= 3sin</span>∅ - 4sin^3<span>∅</span>
Answer: Choice D
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Explanation:
Abbreviations:
sec = secant
cot = cotangent
cosec = cosecant (csc is also a widely used abbreviation)
Let's go through the answer choices one by one
Choice A is false because secant involves the hypotenuse
Choice B is false because opposite/adjacent is the ratio for tangent
Choice C is false because cosecant (csc) involves the hypotenuse
Choice D is true. This is the proper ratio for secant. It is the reciprocal of the ratio for cosine. Recall that cosine's ratio is adjacent/hypotenuse.
Answer:
-1/25
Step-by-step explanation:
Answer:
1, sample.
2, sample
3, complete
4, complete
Step-by-step explanation:
If i am wrong, please let me know. i will give points back + a few extra.
<span>Frequency polygons are a graphical device for understanding the shapes of distributions. </span>
