Question
If X = 15°, find the value of: sin²(4X)
+ cos²(3X) - tan²(2X)Solution
= sin²(60°) + cos²(45°) - tan²(30°)
= (√3/2)² + (1/√2)² - (1/√3)²
= 3/4 + 1/2 - 1/3 = 11/12
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