Math, asked by AlokPrabhakar, 1 year ago

sec^2A+cos^2A is
options;
a.never less than 2
b.always 3
c.always 1
d.none of these

Answers

Answered by Satwatneyearthian

0

the answer is always 1

AlokPrabhakar: how????????

AlokPrabhakar: Take A as 60 and see

Satwatneyearthian: consider A as theta and use the identity sin square theta plus cos square theta is 1

AlokPrabhakar: but its sec square theta in my question

hardhik1: never less than 2

AlokPrabhakar: is there any way to prove it or you know it by trial and error

hardhik1: take secA as 1/CosA cosA must be less than or equal to 1

AlokPrabhakar: why??????

Answered by hardhik1

0

a . never less than 2

hardhik1: is this answer right

hardhik1: plzz mark as brainliest

AlokPrabhakar: ya its right but how to prove it

hardhik1: it is by the graph of cosA

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