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Setler [38]
3 years ago
9

Show that sinx/1+cosx=tanx/2​

Mathematics
1 answer:
hammer [34]3 years ago
7 0

Answer:

See proof below

Step-by-step explanation:

show that

sinx/1+cosx=tanx/2​

From LHS

sinx/1+cosx

According to half angle

sinx = 2sinx/2 cosx/2

cosx = cos²x/2 - sin²x/2

cosx = cos²x/2 - (1- cos²x/2)

cosx = 2cos²x/2 - 1

cos x + 1 = 2cos²x/2

Substitute into the expression;

sinx/1+cosx

= (2sinx/2 cosx/2)/2cos²x/2

= sinx.2/cos x/2

Since tan x = sinx/cosx

Hence sinx/2/cos x/2 = tan x/2 (RHS)

This shows that sinx/1+cosx=tanx/2​

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3x+4=4

Step-by-step explanation:

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3 years ago
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svetoff [14.1K]

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Step-by-step explanation:

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Review of Significant Figures: How many significant figures does the result of the following calculation have: 24.78*(37.3-31.72
horsena [70]

Answer:

The significant figure of the result is 138.8

Step-by-step explanation:

24.78*(37.3 - 31.72)

Solving the bracket first:

37.3 - 31.72 = 5.58

A zero is added to 37.3 before the substraction, so;

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Following the rule of significant figure; we have the answer of the substraction as 5.6 since the least number of significant is one decimal place.

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5 0
3 years ago
Solve for x in the diagram below.
Degger [83]

Answer:

I think the X is equal to 45

5 0
2 years ago
Read 2 more answers
Help quickly please!!!​
Helen [10]

Answer:

1) 0.008

2) 0.22

3) 0.01

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6) 758%

7) 3%

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18) Whatever number you can only see the 1 of, because it didn't make it into the picture.

Hope this helps!

3 0
3 years ago
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