Different Questions

Zeeshan 01 · 2017-07-30 16:45:12

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

zetafunc · 2017-07-31 20:58:49

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"?

Zeeshan 01 · 2017-07-31 22:43:08

Odd except First

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

Zeeshan 01 · 2017-07-31 22:44:21

Q 1 how you bring ans of tan
Q 2 area of triangle??

zetafunc · 2017-07-31 22:54:07

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?

zetafunc · 2017-08-01 00:18:21

Zeeshan 01 wrote:

Odd except First

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

Zeeshan 01 · 2017-08-01 00:23:05

Tan A why Negative>>????

Zeeshan 01 · 2017-08-01 00:24:25

odd except first is only wrong???
what is except first mean??

zetafunc · 2017-08-01 00:27:27

Zeeshan 01 wrote:

Tan A why Negative>>????

Alternatively you can see this by drawing a triangle.

Zeeshan 01 wrote:

odd except first is only wrong???
what is except first mean??

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.

Zeeshan 01 · 2017-08-01 00:29:04

prime numbers is infinite

zetafunc · 2017-08-01 00:30:28

Yes, exactly.

Zeeshan 01 · 2017-08-01 00:30:42

yes ans is 0.75 but negative is not in option

zetafunc · 2017-08-01 00:35:47

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

Zeeshan 01 · 2017-08-01 00:47:02

Question 2

zetafunc · 2017-08-01 00:57:51

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

Zeeshan 01 · 2017-08-01 02:15:05

0.8 is greater than zero 4/5

zetafunc · 2017-08-01 02:23:47

Yes, which contradicts the assumption that

Zeeshan 01 · 2017-08-01 16:23:01

So what to do??

Zeeshan 01 · 2017-08-02 00:53:18

In this question

zetafunc · 2017-08-02 00:54:57

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

Zeeshan 01 · 2017-08-02 00:57:34

Ok area of triangle is half b×h

zetafunc · 2017-08-02 00:58:18

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

Zeeshan 01 · 2017-08-02 00:59:14

What is tangent of interior angle

Zeeshan 01 · 2017-08-02 01:01:38

Can u draw?

zetafunc · 2017-08-02 01:05:36

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 .

Math Is Fun Forum

#1 2017-07-30 16:45:12

Different Questions

#2 2017-07-31 20:58:49

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#3 2017-07-31 22:43:08

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