2cos[(C+D)/2]sin[(C-D)/2] is equal to – McqOptions

MCQOPTIONS

1.	2cos[(C+D)/2]sin[(C-D)/2] is equal to
A.	sinC + sinD
B.	sinC - sinD
C.	cosC - cosD
D.	cosC + cosD
Answer» C. cosC - cosD

Discussion

No Comment Found

Related MCQs

David gets on the elevator at the 11th floor of a building and rides up at the rate of 57 floors per minute. At the same time, Albert gets on an elevator at the 51st floor of the same building and rides down at the rate of 63 floors per minute. If th
There are two examinations rooms A and B. If 10 students are sent from A to B, then the number of students in each room is the same. If 20 candidates are sent from B to A, then the number of students in A is double the number of students in B. The nu
If a&nbsp- b&nbsp= 3 and a2&nbsp+ b2&nbsp= 29, find the value of ab.
You purchased two pieces of cloth measring 1.2 m and 1.3 m each at Rs. 330 and Rs. 270 per meter respectively and gave Rs. 1000 at the payment counter. How much cash will you get back?
You have 20 big and 16 small diaries and want to make gift packs containing both in each pack. What is the maximum number of gift packs you can make without any left over?
XYZ is a right angled triangle and âˆ Y = 90Â°. IfÂ XY = 2.5 cm and YZ = 6 cm then the circumradius ofÂ âˆ†XYZÂ is
x, y and z are prime numbers and x + y + z = 38. What is the maximum value of x?
XÂ =Â 63.55353.05_x005F_x000D_ Find the value of x?_x005F_x000D_
Which value is closest to [5.168 x 4453 x 3.194 / 67.999 x 4224.017]_x005F_x000D_
Which of the following value of 'x' satisfies the equationÂ _x005F_x000D_ 4x-1.92x-6Â =Â 5184_x005F_x000D_