Answer:
Exact value of Cos(45° - 60°) is 0.96 using difference of two angles.
Step-by-step explanation:
Given:
Cos(45° - 60°)
We have to apply the formula of cosine for difference of the two angles.
Formula:
Plugging the values.
⇒ 
We know that the values :
and 
So,
⇒ 
⇒ 
⇒ 
⇒ 
...<em>rationalizing </em>
⇒ 
⇒ 
...<em>taking 2 as a common factor</em>
<em>⇒ </em>
To find the exact values we have to put the values of sq-rt .
As<em>, </em>
and 
Then
<em>⇒ </em>
<em />
<em>⇒ </em>
<em />
⇒ 
So the exact value of Cos(45° - 60°) is 0.96 using difference of two angles.
Answer:
12
Step-by-step explanation:
The way to find the slope side of a traingle is
A^2+B^2=C^2 Next you substitute
5^2+B^2=13^2 Next simplify
25+B^2=169 Next use the subtraction property of equality
B^2=144 Next find the square root
B=12
Hope this helps :)
Answer:
x=67
y=113
z=50
Step-by-step explanation:
x=180-28-85=67
y=180-67=113
z=17+113=50
Answer:
Area= (Base* Height)/2=(Base*12)/2=120
Base*12=120*2=240
Base=240/12
Base=20 m
Step-by-step explanation:
When building a house, one must know the slope of the roof. Another example is when building skate parks, for half pipes require knowledge of slope.
