`cos1 5^(@)-cos7 5^(@)=`

The value of cos(127.5^(@))*cos(7.5^(@))-cos(37.5^(@)).sin(187.5^(@)) is

The value of log_(sec30^(@))(cos^2 6 7^(@)+cos^2 5 3^(@)+cos6 7^(@)*cos5 3^(@)) is equal to

(cos^2 3 3^(@)-cos^2 5 7^@)/(sin2 1^@-cos2 1^@)=

(cos^2 3 3^(@)-cos^2 5 7^@)/(sin2 1^@-cos2 1^@)=

cos^(-1)((cos(7 pi))/(5)) is equal to

cos ^(-1) [ cos ((7pi)/(5))] is equal to

Which of the following statement(s) is/are corect? (1) cos(sin1)>sin(cos1)(2)cos(sin1.5)>sin(cos1.5)(3)cos(sin7(pi)/(18))>sin(cos7(pi)/(18))(4)cos(sin5(pi)/(18))>sin(cos5(pi)/(18))

The value of cos[(1)/(2)cos^(-1)cos((14 pi)/(5))]is(a)cos((2 pi)/(5))(b)cos(-(7 pi)/(5))(c)sin((pi)/(10))(d)-cos((3 pi)/(5))

Prove that (sin 7A - sin 5A)/(cos 5 A + cos 7A ) = tan A.

(cos 7A + cos 5A)/(sin 7A-sin 5A)=