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2 years ago

8

Please please help please please

1 answer:

creativ13 [48]2 years ago

3 0

Answer:

75

Step-by-step explanation:

With reference angle 53°

base (b) = 45

hypotenuse (h) = K

Now

cos 53° = b / h

0.6 = 45 / K

K = 45 / 0.6

K = 75

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TEA [102]

Answer:

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Step-by-step explanation:

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angle $45$ ° and angle $1$ are symetrical so they have the same value.

now that we know that angle 2 is equal to $45$ °

then what is angle 1

if the whole line has an angle of $180$ ° and angle $45$ °.

so the equation will be :

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$180-45=x\\135=x\\x=$ the angle 1 which we found in the given equation is 135

check if my answer is correct is :

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2 years ago

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Paul [167]

Step-by-step explanation:

$\large\underline{\sf{Solution-}}$

Given expression is

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can be re-arranged as

$\rm :\longmapsto\:\dfrac{1}{ \sqrt{3} - \sqrt{2} + \sqrt{5} }$

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On rationalizing the denominator, we get

$\rm \: = \: \dfrac{1}{( \sqrt{3} - \sqrt{2} ) + \sqrt{5} } \times \dfrac{( \sqrt{3} - \sqrt{2} ) - \sqrt{5} }{( \sqrt{3} - \sqrt{2} ) - \sqrt{5} }$

We know,

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$\rm \: = \: \dfrac{ \sqrt{3} - \sqrt{2} - \sqrt{5} }{ {( \sqrt{3} - \sqrt{2} )}^{2} - {( \sqrt{5}) }^{2} }$

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<h3><u>More Identities to </u><u>know:</u></h3>

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Answer:

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