3 years ago

Complementary angles always sum to _____.

Mathematics

2 answers:

dmitriy555 [2]3 years ago

5 0

The answer is: 90° .
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nignag [31]3 years ago

4 0

Complementary angles are two angles whose sum is always 90 degrees

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Cos xcos y=1/2(sin(x+y)+ sin(x-y))

garri49 [273]

Taking Rhs

1/2 [sin(x+y)+ sin (x-y)]

using sinA + sin B = 2 cos (A+B)/2 cos( A - B)/2

1/2 [ 2 Cos ( x+y+x-y)/2 . Cos (x+y-x+y)/2]

=Cos 2x/2. Cos 2y/2 = Cos x . Cos y

Hence true

7 0

3 years ago

Given the quadratic equation below, the standard form of it is

kotykmax [81]

Answer:

Step-by-step explanation:

2x^+9x=10

2x^2+9x-10=0 is standard form

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3 years ago

If Y is inversely proportional to x and y=4 when x= 100, what is the value of y when x=250

hichkok12 [17]

Answer:

y=10

Step-by-step explanation:

$\frac{4}{100}$ = $\frac{y}{250}$

cross-multiply, 4*250=100y

isolate the variable and solve for y, 1000=100y

divide 100 on both sides, 10=y

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2 years ago

If f (x) = 3(x+5) +-, what is f(a+ 2)?

Anastaziya [24]

Answer:

Step-by-step explanation:

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3 years ago

BE SURE PLEASE BRAINLIEST<br> Let C=20. Evaluate the expression <br> 2c+6

Dafna1 [17]

2c+6
C=20
2(20)+6=
40+6 = 46

8 0

3 years ago

Read 2 more answers