Answer:
1) 378.1 in²
2) 8.4 m²
Step-by-step explanation:
Area of sector=
1) Area of sector
2) Area of sector
Tn=n^2+bn+c. Find the values of b and c if the sequences starts with - 1,2,7,14,..
1 answer:
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Answer:
(d).
Step-by-step explanation:
sin² β + cos² β = 1
cos (α + β) = cos α cos β - sin α sin β
cos α = √(1 - ) = 21 / 29
cos β = 12 / 13
sin β = √(1 - ) = 5 / 13
sin α = 20 / 29
cos (α + β) = ×
-
×
=