Find cos (π/3 + a), where sin (a) = (1/√3), and 0

Question

Mathematics

Elsa Holder

11 July, 16:42

Find cos (π/3 + a), where sin (a) = (1/√3), and 0

+3

Answers (2)

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Amiah Berg · Answer 1

a = approx 35.2644

cos (pi/3+a) = approx 0.999998973

Step-by-step explanation:

solve for sin (a)

sin a = (1/sqroot of 3)

arcsin sin (a) = arcsin (1/sqroot of 3)

a = arcsin (1/sqroot 3)

a=approx 35.2644

now substitute a into the cos formula

Humberto Grimes · Answer 2

Humberto Grimes 11 July, 17:19

0

answer is (1/2) when a=0