Trigonometric Ratios Questions

cos2 A (3 − 4 cos2 A)2 + sin2 A(3 − 4 sin2 A)2 is equal to-

2 sin2 β + 4 cos(α + β)sin α sin β + cos 2 =

=

If cos A = m cos B, then-

If cosα + cosβ = 0 = sinα + sinβ, then cos2α + cos2β is equal to -

If cos2B =, then-

=

1 − 2 sin2=

; ∀ 0 < θ π/4 is

The maximum value of 12 sin θ − 9 sin2θ is-

The maximum value of sin(θ + π/6) + cos(θ + π/6) is attained at

Minimum value of 5 sin2 θ + 4 cos2 θ is -

The minimum value of cos θ + sin θ is -

cos =

The value of tan 6o tan 42o tan 66o tan 78o is-

If 5 tan θ = 4, then =

Which of the following is correct-

cos 52o + cos 68o + cos 172o =

2 sinsin =

tan2θ sec2θ(cot2θ − cos2θ) =