Question

ABhipTg.PNG CA = 80 см; CB = 60 см. AB = cos∢B= sin∢B=

Answer 1

Ответ:

Решение прикреплено. Надеюсь, что всё понятно.

Answer 2

It seems like you've provided some information related to a triangle ABC, including side lengths and trigonometric functions involving angle B. However, it appears that there might be a confusion or mistake in the notation or the information provided. Let's try to clarify and solve based on the given information:

1. CA (c): 80 cm
2. CB (b): 60 cm

From the given information, we can use the cosine and sine functions to find angle B:

Given that $AB = c = 80$ cm and $CB = b = 60$ cm, we can use the cosine and sine functions as follows:

1. $\cos(\angle B) = \frac{CB}{AB} = \frac{60}{80} = \frac{3}{4}$
2. $\sin(\angle B) = \sqrt{1 - \cos^2(\angle B)} = \sqrt{1 - \left(\frac{3}{4}\right)^2} = \frac{1}{4}$

Now, let's find angle B using the inverse trigonometric functions:

1. $\angle B = \arccos\left(\frac{3}{4}\right)$ (inverse cosine)
2. $\angle B = \arcsin\left(\frac{1}{4}\right)$ (inverse sine)

Please note that the specific values for angle B in degrees or radians would need a calculator to obtain precise numerical values.