Answer:

Step-by-step explanation:

DE :
If y is a solution of given DE then it satisfied the DE.
Differentiate w.r.t t

Using the formula

LHS:
RHS

By using the formula

LHS=RHs
Hence, y is a solution of given DE

Answer:
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; 
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Step-by-step explanation:
For a right angled triangle with one of its angle α (alpha) :-
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According to the question ,
1) When α (alpha) = d
2) When α (alpha) = e