Trigonometry Te...

The value of sin (45° + θ) – cos (45° – θ) is equal to

If sinα = 1/2 and cosβ = 1/2, then the value of (α+β) is

If sinθ – cosθ = 0, then what is the value of (sin⁴θ + cos⁴θ)? [Given (0º ≤ θ ≤ 90º)]

The maximum value of sin x is

The number of solutions of the equation 1 + sin x sin² x/2= 0 in [-π, π]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 perimeter of a triangle ABC is 6 times the arithmetic mean of the sines of its angles. If the side b is 2, then the angle B is

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