Question

Evaluate
$\cos( \pi \3 - cos ^ - 1 (1 \2) )$


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Answer 1

Answer:

If A ABC ~ APQR and AB : PQ = 3:4.

If AB = 9 cm, then PQ = ... .

Step-by-step explanation:

√2+√3/3√2-2√3=a-b√6, find a,bIn ΔABC and ΔPQR

AB=PQ

And BC=QR

CB And RQ extended to X and Y

∠ABX=∠PQY

∠ABC=180

o

−∠ABX=180

o

∠PQY

∠PQR=180

o

−∠PQY=∠ABC

We get in both triangles

AB=PQ

BC=QR

And ∠ABC=∠PQR

Then both triangle are congruent

i.e. ΔABC=ΔPQR