Question

cos7A= sin (A-6) 7A is a acute angle then find the value of A​

Answer 1

$\huge\underline\mathrm\purple{Solution}$

$\implies\sf cos7A=sin(A-6)$

$\implies\sf sin(90-7A)=sin(A-6)$

$\implies\sf 90-7A=A-6$

$\implies\sf 90+6=7A+A$

$\implies\sf 96=8A$

$\implies\sf A=\cancel\frac{96}{8}=12$

Note:-

sin∅ = cos(90-∅)

Answer 2

Answer:

A=12°

Step-by-step explanation:

ANSWER,

please Mark as a brainlist