Question Bank

Simplify: (sin 5A - sin 3A) / (cos 5A + cos 3A).

Value of tan 22.5° is:

What is the value of sin 18°?

If tan A + tan B + tan C = tan A tan B tan C, what can be said about A + B + C?

Simplify: 2 cos(π/4 + A) cos(π/4 - A).

The value of cos² A + cos²(60+A) + cos²(60-A) is:

Simplify: (sin 3A + sin A) / (cos 3A + cos A).

Find the value of tan 15° + cot 15°.

If cos θ + sin θ = √2 cos θ, then cos θ - sin θ is:

Value of cos 36° is:

Simplify: sin²(π/8 + A/2) - sin²(π/8 - A/2).

If tan A = 1/7 and tan B = 1/3, then cos 2A is equal to:

The expression (1 + sin 2θ + cos 2θ) / (1 + sin 2θ - cos 2θ) simplifies to:

Find value of cot 7.5°.

Simplify: sin(A-B)/cos A cos B + sin(B-C)/cos B cos C + sin(C-A)/cos C cos A.

What is the value of tan 3A - tan 2A - tan A?

If A + B + C = π, then sin 2A + sin 2B + sin 2C is:

Simplify: cos³ A sin 3A + sin³ A cos 3A.

What is the value of sin 10° sin 50° sin 70°?

If cos A / a = cos B / b = cos C / c, then triangle ABC is: