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Dima020 [189]
3 years ago
8

Trigonometric Identity help​

Mathematics
1 answer:
vovikov84 [41]3 years ago
7 0

Answer:

sin\pi/4 * sin\pi/6 = 1/2 *(cos \pi/12 - cos 5\pi/12)

Step-by-step explanation:

Formula:- sinX sinY = (1/2) [ cos (X - Y) - cos (X + Y) ]

sin(π/4)sin(π/6)

= (1/2)[cos(π/4 - π/6) - cos(π/4 + π/6)]

= (1/2)[cos(3π/12 - 2π/12) - cos(3π/12 + 2π/12)]

= (1/2)[cos(π/12) - cos(5π/12)]

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Solve for x. Write the smaller solution first, and the larger solution second.
vekshin1

Answer:

x=-4.73   x=-1.27

Step-by-step explanation:

(x + 3)^2 - 3 = 0

Add 3 to each side

(x + 3)^2 - 3 +3= 0+3

(x + 3)^2 = 3

Take the square root of each side

sqrt((x + 3)^2) =±sqrt( 3)

(x + 3) =±sqrt( 3)

Subtract 3 from each side

x + 3-3 =-3±sqrt( 3)

x = -3±sqrt( 3)

Approximating to 2 decimal places

x=-1.27 x=-4.73

6 0
3 years ago
Read 2 more answers
Solve the equation 2a+b=2a, where a and b are nonzero, real numbers. Describe the solution to this equation and justify your des
ss7ja [257]
<span>To solve this equation we can first assume that both a and b are nonzero real numbers. Hence, A = 1 b = 1 <span><span>
1.   </span>2 (1) + 1 = 2(1)</span> <span><span>
2.   </span><span> 2 + 1 = 2: now this a false equation since there is not equality, the equation cannot retain the equal sign but will become 2 + 1 > 2. Leaving the relationship unequal.

</span></span>However, the alternative to this problem is to be b = 0. To oversee the rule in order to solve the equation retaining it as an “equation”. Further, there is no other solution for this equation. A = 1 b = 0
<span>1.   Which becomes 2(1) + 0 = 2(1)</span> <span><span>
2.   </span><span> 2 + 0 = 2 :
3.    2 = 2. Here we can observe the equality. </span></span> </span>
3 0
3 years ago
Can you please help me with this question with the steps? <br> 8a^3 -2a^2+ 12a-3
KATRIN_1 [288]

I'm assuming you want to simplify the expression since it's not equal to anything.. you can't solve for "a" unless it's equal to something.

factor

8a³ - 2a²+ 12a - 3

2a²(4a - 1) + 3(4a -1)

 (4a - 1) is a like term that can be combined further.

(2a² + 3)(4a - 1)


6 0
4 years ago
1. John and Carolyn are planning a picnic for some of their friends. In all there will be 28 people. They plan to barbecue steak
Sonja [21]

1. 28 x 3/4 = 21 kg

2. 1 hr = 60 mins

=》 1/4 hr = 60/4 = 15mins

4 0
3 years ago
Read 2 more answers
Which statement is always false?
FinnZ [79.3K]

Answer:

All parallelograms are squares

Step-by-step explanation:

Reasoning:

You can have a parallelogram with side lengths, i dont know, 5 and 3, right? That isn't a square :)

8 0
3 years ago
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