Question

Find the complementary angle of$(15+y)°$.

Answer 1

Two angles are said to be complementary if their sum is $90°$

Let the required angle be $a.$

Then, $a+(15+y)°=90°$

$\Rightarrow a=90-15-y$

$\Rightarrow a=75°-y°$

Hence,the complementary angle of $(15+y)°$is $75°-y°$.