Question
What is the simplified value of the given
expression? 4(sin² 20° + sin² 70°) + 2sin 30° - (2sec 60° + cot 45°)Solution
4(sin ² 20° + sin ² 70°) + 2sin 30° - (2sec 60° + cot 45°)
Using, sin(90° - A) = cos A
= 4{sin ² 20° + sin ² (90 - 20)°} + 2 x 1/2 - {2 x 2 + 1}
= 4(sin ² 20° + cos ² 20°) + 1 – 5
Using, sin ² A + cos ² A = 1
= 4 x 1 + 1 - 5 = 4 + 1 - 5 = 0
- Study the given pattern carefully and select the number that can replace the question mark [?] in it.
First row: 10, 6, 964
Second row: 7, 3... Study the given matric carefully and select the number from among the given options that can replace the question mark (?) in it.
What will come in the place of question mark?
What will come in the place of question mark?
M/14 : O/12 : : U/6 : ?
Find the missing number.
Find the missing number.
In the following question, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
Study the given pattern carefully and select the number that can replace the question mark (?) in it.
First row: 14, 17, 40
Second row: 52...
