What one of the following is correct ?
`(1+cos67(1^(@))/(2))(1+cos112(1^(@))/(2))`is

Which of the following is correct? (A) sin1^@>sin1 (B) sin1^@ cos1 (D) cos1^@

Which of the following is/are correct? tan[cos^(-1)(4)/(5)+tan^(-1)(2)/(3)]=(17)/(6)cos[tan^(-1)(1)/(3)+tan^(-1)(1)/(2)]=(1)/(sqrt(2))cos2tan^(-1)((1)/(3))+cos(tan^(-1)2sqrt(2))=(14)/(15)cos[2cos^(-1)(1)/(5)+sin^(-1)(1)/(5)]=-(2sqrt(6))/(6)

Which of the following is/are correct? tan[cos^(-1)4/5+tan^(-1)2/3]=(17)/6 cos[tan^(-1)1/3+tan^(-1)1/2]=1/(sqrt(2))

At constant T and P which one of the following statements is correct for the reaction : CO(g) + (1)/(2) O_(2)(g) rarr CO_(2)(g)

Which of the following is correct? (1) tan1>tan2(2)tan2>tan1(3)sin1cos2 (4) cos3>cos2

cos ((1) / (2) (cos ^ (- 1) 1) / (8)) =

The value of cos(67(1^(@))/(2)) is ………….

In any Delta ABC, prove the following: (a+b+c)(cos A+cos B+cos C)=2((a cos^(2))(1)/(2)(A+b cos^(2))(1)/(2)(B+cos^(2))(1)/(2)C)

Prove the following identities : (cot A - cosec A)^(2) = (1 - cos A)/(1 + cos A)