Question

cot^2 60° + sin^2 45° + sin^2 30° + cos^2 90° = 13/12​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

LHS:

cot^ 60 + sin^2 45 + sin^2 30 + cos^2 90

= (1/√3)^2 + (1/√2)^2 + (1/2)^2 + 0^2

= 1/3 + 1/2 + 1/4

= (4 + 6 + 3 )/ 12

= 13/12

= RHS