Answer: The equivalent expression in degrees is 60°.
Step-by-step explanation: We are given to find the equivalent of the following expression in degrees.
We will be using the UNITARY method the solve the given problem.
We know that
Thus, the equivalent expression in degrees is 60°.
Answer:
15
Step-by-step explanation:
Using the formular, Sn = n/2(2a + (n - 1)d)
where, n = 6: Sn = 6/2( -20 + 5(3)) = 3(15 - 20)
∴ Sn = 15