Math, asked by ushosree, 9 months ago

plz solve these 2 sums plzz

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Answers

Answered by ishansoni

1

Answer:

Step-by-step explanation:

I am proving the second part.

See In a Triangle A+B+C = 180

Therefore A+B = 180-C

Now

Sec((A+B)/2)= sec(180/2 - C/2) = sec (90- C/2) Which equals Cosec(C/2)

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