Question

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Answer 1

Ответ:

A)

Объяснение:

∠OSK=a; SK=l.

sin∠OSK=OK/SK; →

OK=SK*sin∠OSK=l*sina.

AB=2*OK=2*l*sina.

Sосн=АВ²=(2l*sina)²=4*l²*sin²a.

cos∠OSK=SO/SK; →

SO=SK*cos∠OSK=l*cosa.

V=⅓*Sосн*SO=⅓*4*l²*sin²a*l*cosa=

=4/3*l³*sin²a*cosa.

Answer 2

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