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noname [10]
3 years ago
5

given a is equal to 60 degree and 30 degree prove that sin a + b is equal to sin a cos b + cos a sin b ​

Mathematics
1 answer:
Feliz [49]3 years ago
8 0

Answer:

A = 60 and B = 30  

Now, A + B = 60 + 30 = 90  

Also, A – B = 60 – 30 = 30  

sin (A + B) = sin 90 = 1  

sin A cos B + cos A sin B = sin 60 cos 30 + cos 60 sin 30

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aliina [53]

Answer:

\fbox {x-intercepts : (1, 0) and (-3, 0)}

\fbox {Roots : x = 1, x = -3}

Step-by-step explanation:

<u>Given</u> :

  • y = 4x² + 8x - 12

4 cancels throughout.

  • <u>y = x² + 2x - 4</u>

<u>Solving by quadratic formula</u> :

  • x =  -8 ± √(8)² - 4(4)(-12) / 8
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∴ Hence, the x-intercepts are (1, 0) and (-3, 0). The roots of the equation are 1 and -3.

7 0
2 years ago
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ArbitrLikvidat [17]

Answer:

If two angles sum is equal to 90° and makes right angle called = complementary angle...☺️✌️

Above sum solution....

one angle =x

other angle =y

According to question

x+y= 90°......(1)

x-y=22°......(2)

from one and two ....by eliminating method...

2y=68

y=68/2

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x= 56...

To verify add both

sum = 90°

Hence ..verified...

Step-by-step explanation:

hope its helps u...☺️✌️✌️

5 0
3 years ago
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vitfil [10]

Answer: 1,2,3 becuase they are all equivalent its just logic when you think abt it

Step-by-step explanation: 4 makes no sense

3 0
3 years ago
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Zolol [24]

Answer:

B

Step-by-step explanation:

-(-a)/b = a/b

Option A is not equal to a/b

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4 0
3 years ago
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Evaluate the following expression using the values given by three X to the power of two minus Y to the power of three minus Y to
earnstyle [38]
203 and that is the answer
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