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1 answer:
Answer:
15th term of the sequence is 36
Step-by-step explanation:
Given in the question,
a₁ = First term = -20
d = common difference = 4
Expression for the nth term of an arithmetic sequence is,
Here, n = number or term
We have to calculate 15th term of the sequence,
= -20 + 56
= 36
Therefore, 15th term of the sequence is 36.
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Answer:
Step-by-step explanation:
we know that
In the triangle abc
if
then
Because, the sum of the interior angles in a triangle must be equal to 180 degrees
therefore
Triangle abc is a right triangle
see the attached figure to better understand the problem
The sine of angle a is equal to divide the opposite side to angle a by the hypotenuse
so
The cosine of angle b is equal to divide the adjacent side to angle b by the hypotenuse
so
therefore
When two angles are complementary, the sine of one angle is equal to the cosine of the other angle and the cosine of one angle is equal to the sine of the other angle
so
