Answer:
20.5 cm
Step-by-step explanation:
I just used Pythagorean theorem in which c^2=a^2+b^2
so this is c^2= 225 + 196 and then you get c^2= 421 and finally you get the square root of 421 so this way you finally get 20.5 cm
D it the answer you have to multiply each one
Answer:
11,
Step-by-step explanation:
the two lines makes it positive, and so 5+6= 11
The required value is the angle theta and the value of the cosine of the angle is 0.9659
Given the expression of sine of an angle expressed as;

For us to get the cosine of the angle, we need to get the value of theta first as shown:

Next is to get the value of cos theta

The required value is the angle theta and the value of the cosine of the angle is 0.9659
Learn more here: brainly.com/question/13729598