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**Zeeshan 01****Member**- Registered: 2016-07-22
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Question 1: If sinA=3/5 and cosA< zero ,then tan A= ???

Options(0.75,-0.66,-0.80,0.80)

Question 2: For any triangle if tangent of any internal angle=0 then the area of triangle is

Options(Zero,Infinity,Undefined,Not sure)

Question 3 : Which of the following about set of primes is not true

Options(Subset of Z,Finite,Odd except 1,Cannot divide each other)

I Think it is odd except 1 this option is not true

Give ans or send me link of this topic

MZk

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For question 1, must be negative (do you see why?). It seems to me that the answer should be , which is not listed.For question 2, gives or . This corresponds to three collinear points.For question 3, clearly all primes are integers, so they must be a subset of , and by definition, none of them divide each other. For the "odd except 1" statement, is a prime number, and isn't a prime number either, so this statement can't be true. There are also infinitely many primes -- so it seems there are two false statements listed. Did you mean to write "odd except 2"?

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**Zeeshan 01****Member**- Registered: 2016-07-22
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Odd except ** First **

*Last edited by Zeeshan 01 (2017-08-01 00:16:42)*

MZk

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**Zeeshan 01****Member**- Registered: 2016-07-22
- Posts: 689

Q 1 how you bring ans of tan

Q 2 area of triangle??

MZk

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Zeeshan 01 wrote:

Odd except 1

In that case, there are two false statements.

Zeeshan 01 wrote:

Q 1 how you bring ans of tan

Use the fact that (3,4,5) is a Pythagorean triple.

Zeeshan 01 wrote:

Q 2 area of triangle??

What's the area of a triangle whose points all line on a straight line?

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Zeeshan 01 wrote:

Odd except

First

OK, in that case, there is only one false statement: the finiteness claim.

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**Zeeshan 01****Member**- Registered: 2016-07-22
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Tan A why Negative>>????

MZk

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**Zeeshan 01****Member**- Registered: 2016-07-22
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odd except first is only wrong???

what is except first mean??

MZk

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Zeeshan 01 wrote:

Tan A why Negative>>????

Alternatively you can see this by drawing a triangle.

Zeeshan 01 wrote:

That is a correct statement. It is claiming that all prime numbers, apart from the first prime number (that's ) are odd. The only statement which is not true is the 'finite' statement.
odd except first is only wrong???

what is except first mean??

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**Zeeshan 01****Member**- Registered: 2016-07-22
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prime numbers is infinite

MZk

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Yes, exactly.

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**Zeeshan 01****Member**- Registered: 2016-07-22
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yes ans is 0.75 but negative is not in option

MZk

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If the answer were , then that would imply that (i.e. that it is positive).

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**Zeeshan 01****Member**- Registered: 2016-07-22
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Question 2

MZk

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Yes, what do you think the area of a triangle with all its points on a line could be?

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**Zeeshan 01****Member**- Registered: 2016-07-22
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0.8 is greater than zero 4/5

MZk

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Yes, which contradicts the assumption that

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**Zeeshan 01****Member**- Registered: 2016-07-22
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So what to do??

MZk

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**Zeeshan 01****Member**- Registered: 2016-07-22
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In this question

MZk

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I don't think any of the options listed are correct. The first option seems closest, though it has the wrong sign.

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**Zeeshan 01****Member**- Registered: 2016-07-22
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Ok area of triangle is half b×h

MZk

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So what is the area of the triangle in this case, do you think?

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**Zeeshan 01****Member**- Registered: 2016-07-22
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What is tangent of interior angle

MZk

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**Zeeshan 01****Member**- Registered: 2016-07-22
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Can u draw?

MZk

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The interior angle is just the angle between two sides.

By 'tangent', they mean . That is, if is the interior angle, they're asking you about .

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