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Dima020 [189]
4 years ago
8

Trigonometric Identity help​

Mathematics
1 answer:
vovikov84 [41]4 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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larisa86 [58]

This is all about operations priority! We have to perform the operations in the right order, remembering that parentheses come first, then powers, then multiplications and then additions:

Start with

4(10-4)^2+4

Perform the operations inside parenthesis first:

4\cdot 6^2+4

Perform the square:

4\cdot 36+4

Perform the product:

144+4

Perform the sum:

148

Note: you have an extra parenthesis at the end, and none of the options meets the result. I'm afraid that there's a typo in the question, but this should still give you a valid strategy to solve the actual exercise.

4 0
4 years ago
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tino4ka555 [31]

Answer:

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Step-by-step explanation:

salesperson receives a monthly salary of $2,250

commission of 4.5% on all sales compute

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total pay =  $2,250 + 4.5% of $98,450

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6 0
3 years ago
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Answer:0.8 feet

Step-by-step explanation:got it right

7 0
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svetoff [14.1K]

Answer:

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Step-by-step explanation:

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3 years ago
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fiasKO [112]
Your total area would be 150.8
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3 years ago
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