Trigonometry Te...

The number of solutions of the equation 1 + sin x sin² = 0 in is

The area of a triangle is 80cm2 and its perimeter is 8 cm. The radius of its inscribed circle is

tan x is periodic with period

The magnitude of a radian is

The value of x ∈ R, for which 2^{sin x} + 2^{cos x}  does not hold true, is

If tan A = 1/2 and tan B = 1/3, then the value of sin (A + B) is

The maximum value of 4 sin² x + 3 cos² x is:

If for real values of x, cos  = x + 1/x, then 

tansincos =

The value of sin 20^o sin 40^o sin 60^o sin 80^o is

The period of tan(x + 3x + 5x + 7x) is

Which of the following expressions is rational?

The greatest value of sin x × cos x is 

If sin = cos , then  is equal to

The maximum value of sin x is

If tan + sec = ; 0 <  <, then  is equal to

If a = 4, b = 3 and A =60∘, then c is a root of the equation

The value of sin (45^o + ) – cos (45^o –) is

If A = cos²Ө + sin⁴ Ө, then for all values of Ө

Which of the following is correct?

Find the value of cos 30^o . cos 60^o . ------- cos 90^o . cos 220^o.

If the period of the function
f(x) = sin is 4π, then n is equal to