Question

What is the value of (cos 67-sin 23")?​

Answer 1

Answer:

0

Step-by-step explanation:

$\longrightarrow\cos ^{2} (67) - \sin ^{2} (23) \\\longrightarrow { \cos}^{2} (67) - { \cos }^{2} (90 - 23) \\ \longrightarrow { \cos }^{2} (67) - { \cos }^{2} (67) = \purple0$