The melting point of sea water is -2.4
Answer:
216
Step-by-step explanation:
Lots of means multiplication so:
18 × 12 = 216
HOPE THIS HELPED
<span> x/3-2=7
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SImplify
1/3x - 2 = 7
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add 2 to each side
1/3x - </span><span><span>2 </span>+ 2 </span>= <span>7 + <span>2
1/3x = 9
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Multiply each side by 3
3 * (1/3x) = 3 * 9
x = 27</span></span>
Since both α and β are in the first quadrant, we know each of cos(α), sin(α), cos(β), and sin(β) are positive. So when we invoke the Pythagorean identity,
sin²(x) + cos²(x) = 1
we always take the positive square root when solving for either sin(x) or cos(x).
Given that cos(α) = √11/7 and sin(β) = √11/4, we find
sin(α) = √(1 - cos²(α)) = √38/7
cos(β) = √(1 - sin²(β)) = √5/4
Now, recall the sum identity for cosine,
cos(x + y) = cos(x) cos(y) - sin(x) sin(y)
It follows that
cos(α + β) = √11/7 × √5/4 - √38/7 × √11/4 = (√55 - √418)/28
Answer:
non linear
Step-by-step explanation:
