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3 years ago

10

Evaluate -x +(-5.8) for x= 7.1.

2 answers:

creativ13 [48]3 years ago

7 0

-7.1+-5.8=-12.9
hope this helps :)

Reika [66]3 years ago

7 0

-1.3.....................................................................

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To find:

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Solution:

Using Pythagoras theorem,

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Taking square root on both sides.

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So, measure of BC is 8 units.

Now,

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Similarly,

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And,

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$\cos B=\dfrac{8}{10}$

$\cos B=\dfrac{4}{5}$

Therefore, the required trigonometric ration are $\sin B=\dfrac{3}{5}, \tan A=\dfrac{3}{4}, \cos B=\dfrac{4}{5}$ .

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