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If cos α + sec α = √3, then the value of cos3 α + sec3 α is (SSC CGL 2014)
- a)2
- b)1
- c)0
- d)4
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
If cos α + sec α = √3, then the value of cos3 &alpha...
cos α + sec α = √3
taking cube both sides
cos3α + sec3 α + 3 cosα secα (cosα + secα)
= 3√3
cos3α + sec3α + 3√3 = 3√3
cos3α + sec3α = 0
taking cube both sides
cos3α + sec3 α + 3 cosα secα (cosα + secα)
= 3√3
cos3α + sec3α + 3√3 = 3√3
cos3α + sec3α = 0
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If cos α + sec α = √3, then the value of cos3 α + sec3 α is (SSC CGL 2014)a)2b)1c)0d)4Correct answer is option 'C'. Can you explain this answer?
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