Question

Using Pythagoras theorem

Please explain

Please answer it correctly

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Please answer it very fast

Answer 1

Answer:PLEASE MARK BRAINLIEST

tanA = 1

And also tan45 = 1

so, a = 45

Similarly,

tanB = √3

And also tan60 = √3

So, B = 60

cos45.cos60 - sin45.sin60

cos45 = sin45

So,

= 1/√2(1/2  -  √3-2)

= (1-√3) /2√2

Answer 2

Answer:

He shifted the pH of the fresh milk from 6 to slightly alkaline to prevent milk from getting sour due to production of lactic acid.

(b) This milk takes long time to set into curd because the lactic acid produced here first neutralises the pH then the pH is reduced to turn milk to curd.