Объяснение:
AH=4√3 AB=8 cos∠B=?
BH=√(8²-(4√3)²)=√(64-48)=√16=4 ⇒
cos∠B=BH/AB=4/8=1/2.
∠B=60°.
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Объяснение:
AH=4√3 AB=8 cos∠B=?
BH=√(8²-(4√3)²)=√(64-48)=√16=4 ⇒
cos∠B=BH/AB=4/8=1/2.
∠B=60°.