Question
If sin 2a = (7/9), then find the value of (sin a + cos
a).Solution
sin 2a = (7/9)
Adding 1 to both sides, we get;
1 + sin 2a = (16/9)
We know that (sin²a + cos²a) = 1 and (sin 2P = 2 sinP cosP)
sin²a + cos²a + 2 sin a cos a = (16/9)
(sin a + cos a)² = (16/9)
(sin a + cos a) = 4/3
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.)...
A man must travel 600 km in 12 hours. If he traveled the first 40% of the journey at a constant speed of 80 km/h, at what speed must he travel the remai...
78% of 1450 + 26² = ? + 1323 ÷ 17
What will come in place of the question mark (?) in the following series?
50, 25, 25, ?, 75, 187.5
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.)...
`(601/49)xx(399/81)` ÷ `(29/201)` = ?
(424.98 ÷ 16.99 + ?) × 1.99 - 211.99 ÷ 2.01 = 24.98 × (4.012 - 3.99)Â
(7008.79)2/7009.201 × √1442.76 × 0.4897 =?
25.19% of (?2 ÷ 38.87 × 4679.94) = 6299.82 ÷ 419.78 × 50.15
7480 ÷ 16.98 – 34.32 ÷ (4.99/99.9) = ?
