Most answered puzzles under tag trignomatry

+1 vote

If it is given that Sin A = Cos A then calculate Cos 2A?

posted Jan 21, 2015 by Salil Agrawal

+1 vote

What would be the value of Sin(50 + A) - Cos(40 - A)

posted Mar 3, 2016 by anonymous

0 votes

If Tan A*Tan B = 3 then what would be the value of Cos (A+B) / Cos (A-B)?

posted Dec 6, 2015 by anonymous

0 votes

If A+B = 225 then what would be (1+tan A)(1+tan B) = ??

posted Nov 20, 2015 by Madhavi Latha

+1 vote

What is the value of sin^4 1 + sin^4 2 + sin^4 3 + sin^4 4 ... sin^4 88 + sin^4 89 = ?

posted Aug 10, 2018 by anonymous

0 votes

If a + 1/a = 2 Cos 6 then a^1000 + 1/a^1000 + 1 = ??

posted Dec 21, 2017 by anonymous

0 votes

What is the range of the values of k such that k Cos A - 3 Sin A = k + 1 has a real solution?

posted Oct 6, 2017 by anonymous

0 votes

If in a triangle ABC: Cos A + Cos B + Cos C = 3/2 then what is so special about this triangle?

posted Jul 23, 2016 by anonymous

0 votes

What is the distance between the points (a cos 25, 0) and (0, a cos 65)?

posted Mar 2, 2016 by anonymous

0 votes

If P=Sin A.Sin B, Q= Sin C.Cos A, R = Sin A.Cos B and S=Cos A.Cos C then 5(P^2+Q^2+R^2+S^2) = ??

posted Jul 21, 2015 by anonymous

0 votes

If for a triangle Cos A + Cos B + Cos C = 3/2, then what is special about the triangle?

posted Feb 1, 2015 by anonymous

+1 vote

If Sin A + Sin^2 A = 1 then what would be Cos^2 A + Cos^4 A

posted Jan 23, 2015 by Salil Agrawal

0 votes

In triangle ABC, if angle B is 30, what is the range of CosASinC?

posted May 22, 2019 by anonymous

–1 vote

If 5(tan²x-cos²x)=2cos 2x+9 then what is the value of cos 4x

posted Apr 3, 2017 by Vishal Singh

+1 vote

If Sin A + Cos A = sqrt(2) Sin (90 - A) then Cot A = ??

posted Jul 27, 2015 by Tapesh Kulkarni

0 votes

What would be the value of Tan 6 * Tan 42 * Tan 66 * Tan 78?

posted Feb 6, 2015 by anonymous

+2 votes

What would be the possible values of A for a equation Cos^2 A = 1

posted Jan 29, 2015 by Vikram Luthra