Question

5. If 'x^' and 'y' are complementary angles, then
a. sinx=siny
b. tanx=tany
c. cosx=cosy
d. sinx=cosy

Answer 1

Answer:

complimentary angles means sum of that two angles is 90 degree .

so here x+y=90 degree

so y=90-x

so, multiply by cos on both side .

so, cos(y)=cos(90-x)

and we know that cos(90-x) = sin(x)

so finally , cosy = sinx , option d is the correct answer.

Answer 2

Answer:D is correct

Explanation :

X+Y=90

So that,

X=90-y

Cos(x) Cos(90-y)

According to all siver tea cupsThey r in 1st co-ordinate In 1st co-ordinate the cos is +ve

So, cos (90 - y) =sin(y)

Where 90-y=x so, Cos(x) = sin(y)

Hope you understand