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3 years ago

Which expression is equivalent to 174 (17) (17-3) -? 17-2 4

1 answer:

6 0

None of the above are equivalent to 174 ? Is that the whole question with all the answers? Because none of those are correct.

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If tanA+cotA=2 then find the value of cosA

aniked [119]

Answer:

cos A=

$\frac{1}{ \sqrt{2} }$

Step-by-step explanation:

We know,

cotA=

$\frac{1}{ \tan(a) }$

Substituting the value of cot A in the given equation, we get

$\tan( a) + \frac{1}{ \tan(a) } = 2$

$\frac{{ \tan }^{2} a + 1}{ \: \tan(a) } = 2$

${ \tan }^{2 \: } a \: + 1 = 2 tan \: a$

${ \tan }^{2} a - 2 \tan \: a + 1 = 0$

$( \tan \: a - 1) {}^{2 } = 0$

$\tan \: a - 1 = \sqrt{0}$

$\tan \: a = 1$

$\tan \: a \: = \tan \: 45$

$a = 45$

$\cos \: a = \cos \: 45$

$\cos \: a = \frac{1}{ \sqrt{2} }$

4 0

3 years ago

What is 0.2 repeating written as a fraction

Umnica [9.8K]

It cant be a fraction because of the repeating... that is what my math teacher said

8 0

4 years ago

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The sum of 1/2 and 2/3 is ___________________

Korvikt [17]

1/2 is less than 2/3

6 0

3 years ago

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-9x2 + 13x – 1=0<br><br> I need 3 answers, pls help me:)

kifflom [539]

The answer to this question is x = 13/9 = 1.444

5 0

3 years ago

>>> The equation T^2 = A^3 shows the relationship between a planet’s orbital period, T, and the planet’s mean distance

Virty [35]

If planet Y is k times the mean distance from the sun than planet X, the right side of the equation becomes (kA)^3. which is k^3 times the left side, T^2. To equate both sides of the equation, multiply T by k^3/2 so that the left side becomes ((k^3/2) x T)^2 which simplifies into (k^3) x (T^2). Therefore, the answer is k^3/2.

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4 years ago

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