Question

cos²0+cos²π/3+cos²π/3+cos²π/2​

Answer 1

Answer:

Pre-Requisites:

• Cos 0 = 1

• Cos π/3 = Cos 60 = 1/2

• Cos π/2 = Cos 90 = 0

Given Question:

• Cos²0 + Cos² ( π/3 ) + Cos² ( π/3 ) + Cos² ( π/2 )

Solution:

Substituting the given values we get,

⇒ ( 1 )² + ( 1/2 )² + ( 1/2 )² + 0

⇒ 1 + 1/4 + 1/4 + 0

⇒ 1 + 1/2

⇒ 3/2 or 1.5

Hence the value of the given equation is 1.5.

Hope it helped !!

Answer 2

Solutions:

cos²0+cos²π/3+cos²π/3+cos²π/2

(1)² + (1/2)² + (1/2)² = 0

1 + 1/4 + 1/4 = 0

1 + 1/2 = 0

3/2

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