ye step kaise aaya?? uss pahle wahi line ke baad
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9
Answer:
cos A= 1/sec A
aur sec A = 1/ cos A (yeh kya h Vaibhavi kuch bhi matlab ::( dekho aaj tum rest karlo mein bol raha hu na tum sad mein nhi pardh paogi sahis
Answered by
4
Answer:
That line came after that because sec^2A - tan^2A = 1
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