Question
If X = 15°, find the value of: cos²(2X) +
sin²(3X) - tan²(2X)Solution
= cos²(30°) + sin²(45°) - tan²(30°)
= (√3/2)² + (1/√2)² - (1/√3)²
= 3/4 + 1/2 - 1/3 = 11/1
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
24.11 × 5.98 + 25.03 × 3.12 – 34.99 + 96.9 × 5.02 =?
A salesman is allowed 32% commission on the total sales by him and a bonus of 3% on the sales over Rs. 15000. If the total earnings of a salesman is Rs....
12.052 + 36.15 × 25.45 – 124.15 × 15.05 = ? × 8.08 – 64.32 × 15.98
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
What is the value of "π"
25.22 of 359.98% + 499.99 ÷ 25.18 = ?
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
? = 19.89% of (29.89 × 12.44) + 9.96 × 12.022
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