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LOD 1 trigo ques

 
ishika rathi
(@ishikarathi)
New Member

max value of x if 9cosP+x <= 40sinP?

1632549677-Screenshot-2021-09-25-112556.png
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Topic starter Posted : 25/09/2021 11:31 am
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Rahul Singh
(@rahul)
Admin

We know the identity, Cos (P+Q) = CosPCosQ – SinPSinQ

If CosQ= 9/41 then SinQ = 40/41

-1 ≤ Cos (P+Q) ≤ 1

-1 ≤ Cos P * 9/41 – SinP * 40/41 ≤ 1

9CosP – 41 ≤ 40CosP

X = -41

Hence, option d is the correct answer.

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Posted : 05/10/2021 11:40 pm
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