1+cos56^@+cos58^@-cos66^@=...

`1+cos56^@+cos58^@-cos66^@=`

A

1) `2cos28^@cos29^@cos33^@`

B

2) `4cos28^@cos29^@cos33^@`

C

3) `4cos28^@cos29^@sin33^@`

D

4) `2cos28^@cos29^@sin33^@`

Verified by Experts

Similar Questions

Explore conceptually related problems

1+ cso 56^(@) + cos 58^(@) - cos 66^(@)=

The value of cos52^@+cos68^@+cos172^@ is

cos20^@cos40^@cos80^@=

Show that cos24^@+cos55^@+cos125^@+cos204^@+cos300^@=1/2

Prove the following: cos12+cos84^@+cos156^@+cos132^@=-1/2

Prove the following: cos20^@cos40^@cos60^@cos80^@=1/16

Select the correct option from the given alternatives.The value of the expression cos1^@ cos2^@ cos3^@..........cos179^@= …………

The value of cos20^@cos40^@cos60^@cos80^@ is equal to

The value of cos 52^@ + cos 68^@ + cos 172^@

Without using trignometric tables,prove the following: cos40^@+cos50^@+cos70^@+cos80^@=cos20^@+cos10^@