Question

cos square 2 pi/3+sin square 5 pi/6-cot square 3 pi/4​

Answer 1

Answer:

the answer is 1/2

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Answer 2

Answer:

Sin²(2π/3) + Cos²(π/6) - Tan²(3π/4)

= Sin²(π - π/3) + Сos²(π/6) - Тan²( - π/4)

= Sin² (π/3) + Cos²(1/6) - (-Tan²(π/4))

=(√3/2)² + (√3/2)² - (-1)²

= 3/4 + 3/4 - 1

= 2/4

= 1/2.