18. 0.625
19. -0.75
20. -4/10 = -0.4
Answer:
cos 78⁰.
Step-by-step explanation:
Use cos 2A = cos^2 A - sin^2 A
so cos^2 39 - sin^2 39 = cos (2*39) = cos 78.
Answer:i thinks is 115.9 maybe im not sure because its in my HW
Step-by-step explanation:
Answer:
<em>Gradient of KL = 2</em>
Step-by-step explanation:
From the diagram, we are to calculate the gradient of KL. Gradient is salso known as the slope of the line.
Gradient of KL = ΔOK/ΔOL
Given
OK = 2OL
Substitute into the formula
From the diagram, ΔOL = -5
ΔOK = 2ΔOL
ΔOK = 2(-5)
ΔOK = -10
Hence;
Gradient = -10/-5
<em>Gradient of KL = 2</em>
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Answer:
The answer is probably (1,2,3)
Step-by-step explanation:
If you add 1, 2, and 3 together you get 6 yes?
Then you would subtract 2, then you get the answer.
