Question

If xsin30°cos60° = sin45°cos45°, then the value of x is:

• A. 2
• B. 0
• C. 1
• D. 3

Answer 1

Answer:

A. 2

Solution:

Trigonometry value used:

Calculation:

x sin30° cos60° = sin45° cos45°

⇒ x (1/2) (1/2)  = (1/√2) (1/√2)

⇒ x/4 = 1/2

⇒ x = 4/2

⇒ x = 2

∴ Value of x is 2.