In DeltaABC, a=5, b=7, c=8, find cosB/2...

In `DeltaABC`, a=5, b=7, c=8, find `cosB/2`

Text Solution

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`sqrt(3)/2`

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In DeltaABC, a=9, b=8 and c=4, then 3cosB-6cosC=?

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NAGEEN PRAKASHAN-TRIGNOMETRIC FUNCTIONS-EXERCISES 3O

In DeltaABC, a=5, b=7, c=8, find cosB/2
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In DeltaABC, a=17,b=8,c=15, find sinB/2.
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