Question

sin^2 30 + sin^2 60+ sin^2 120 + sin^2 150 =​

Answer 1

Sin^2 30 + Sin^2 60 + Sin^2 120 + Sin^2 150 =

Sin (1/2)^2 + Sin (√3/2)^2 + Sin^2 (60+60) + Sin^2 (180-30)

Sin 1 + Sin 3/2 + Sin 3/2 + sin 1

3/2+3/2 = 6/2 = 3

Answer 2

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Step-by-step explanation:

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