3 years ago

Find the exact value of the expression cos10°cos20°-sin10°sin20° Please Help

1 answer:

5 0

Cos10 cos20 -sin10 sin20 = cos(10+20) = cos30 = √3/2

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lions [1.4K]

Answer:

Si el número es x, entonces 1.4x + x = 84,

Entonces 2.4x = 84 yx = 84 / 2.4 = 840/24 = 35.

El otro número es 84-35 = 49

Step-by-step explanation:

Espero que te ayudo

Dejame saber : )

7 0

2 years ago

malfutka [58]

This resembles a quadratic and we can factor it using that pattern.

$(x^2)^2-(10x^2)+9=0$

$(x^2-9)(x^2-1)$

$(x+3)(x-3)(x+1)(x-1)=0$

6 0

3 years ago

monitta

Answer:

8 + x = 50, so Jose's saving or x = 42

Hope this helps!

7 0

2 years ago

frez [133]

The answer is $\frac{8}{25} -i\frac{19}{25}$

Steps: (<em>in the attachment</em>)↓↓↓↓↓

<em>Hope this helps!!</em>

3 0

2 years ago

BabaBlast [244]

Convert minutes to hour(35/60=.58 then multiply 25mph to get 14.5 miles

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2 years ago