Question Text
Question 1 :
Which one of the following is the value of $\displaystyle \cos 170^{0}\cos 10^{0}-\sin 170^{0}\sin 10^{0}$?
Question 2 :
If in a ΔABC,<img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e870eb819f8d44d3a17ff6b' height='33' width='192' >, then angle A equals to
Question 3 :
If a, b, c and d are the sides of a quadrilateral, then the value of <img style='object-fit:contain' src='https://storage.googleapis.com/teachmint/question_assets/JEE%20Main/5e870ebde6d3604eaa92f1c3' height='35' width='68' > is always greater than
Question 4 :
If x > 0, y > 0 and x > y, then tan<sup>-1</sup> (x/y) + tan<sup>-1</sup> [(x + y)/ (x - y)] is equal to-
Question 5 :
If α = sin<sup>-1</sup> (cos (sin<sup>-1</sup>x)) and β = cos<sup>-1</sup> (sin (cos<sup>-1</sup> x)), then-
Question 6 :
In a $\triangle ABC,\cos { B } \cos { C } +\sin { B } \sin { C } \sin ^{ 2 }{ A } =1$.Then the triangle is