UPSC CDS Math Trigonometric Ratios and Trigonometric Identities Questions

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Question : 14 of 107
 
Marks: +1, -0
If 0 < θ < 90°, 0 < Φ < 90° and cos 0 < cos Φ , then which one of the following is correct ?
[2018 CDS-II]
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