3 years ago

Evaluate the expression. Make sure your work is clearly shown. (4/9)^-1/2

Mathematics

1 answer:

irina [24]3 years ago

8 0

Can you make this more clear?? not really sure what I'm supposed to be doing here

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2 years ago

Simplify 3x[18+{3+4÷(4-2)}]

tresset_1 [31]

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$3 \times 18 + 3 + 4 \div ( 4 - 2)$

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2 years ago

If 0°<0<90° and sin0=12/13, find cos0 using trigonometric identities.

Aleks04 [339]

here's the solution,

we know :

$\sin( \theta) = \dfrac{perpendicular}{hypotenuse}$

So,

$\dfrac{p}{h} = \dfrac{12}{13}$

so.. let the perpendicular be 12x and hypotenuse be 13x

now,

by applying pythagoras theorem,

$b {}^{2} = h {}^{2} - p {}^{2}$

where,

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So,

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so,

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$\cos( \theta) = \dfrac{5}{13}$

hope it helps !!

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2 years ago