Question

if sinC=cosD then find C+D​

Answer 1

Given that:

sin C = cos D

To find:

C + D

Solution:

We know that:

$\boxed{\tt{\green{sin \: x = cos\: (90- x)}}}$

Thus, the given equation changes to:

$\tt{\blue{cos \:(90- C) = cos \:D}}$

→ $\tt{90 - C = D}$

→ $\boxed{\tt{\red{C + D = 90 \degree}}}$