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If sin y = 7/q and tan y= 7/r then the value of cos y is \frac{r}{q}

Step-by-step explanation:

Solution:

The values of sin y and tan y are given as 7/q and 7/r respectively.

We know the relationship between tan cos and sin which is

 --- equation 1

Since we already know the values of sin y and tan y we can easily find the value of cos y by substituting the values in eq1

Taking cos y to the other side of the equal to sign we get

Hence the value of cos y is \frac{r}{q}