If X = $\frac{3}{5}$ and cos y = $\frac{24}{25}$, where X and Y are acute, find the value of cos (X + Y). 

Similar Questions

Find, in surd form, the value of $\cos 165$....

Which of the following is the semi-interquartile range of a distribution? ...

A binary operation ∆ is defined on the set of real numbers R, by x∆y = \(\sqrt{x+y - \frac{xy}{4...

In how many ways can the letters of the word 'ELECTIVE' be arranged? ...

If $\sin\theta = \frac{3}{5}, 0° < \theta < 90°$, evaluate $\cos(180 - \theta)$....

The position vectors of A and B are (2i + j) and (-i + 4j) respectively; find |AB|. ...

If the sum of the roots of 2x$^2$ + 5mx + n = 0 is 5, find the value of m...

Given that the straight lines $kx - 5y + 6 = 0$ and $mx + ny - 1 = 0$ are parallel, find a relat...

The equation of a circle is $3x^{2} + 3y^{2} + 6x - 12y + 6 = 0$. Find its radius...

Calculate, correct to one decimal place, the angle between 5i + 12j and -2i + 3j. ...