Question

Evaluate
Cos^2 20° + Cos^2 70° / 3 (Sin^2 59° + Sin^2 31°)

full explanation. ..​

Answer 1

Answer:

Step-by-step explanation:

Cos2 20°+cos2(90-20)/3(sin2 59°+sin2 (90-59) )

=Cos2 20°+sin2 20°/3(sin2 59°+cos2 59°)

=1/3(1)

=1/3