Question

Sin(x+50)=cos3x..find tan​

Answer 1

here's the solution,

by using complementary relation between sin and cos,

=》

$\sin(x + 50) = \cos(3x)$

=》

$\cos(90 - (x + 50)) = \cos(3x)$

=》

$90 - x- 50 = 3x$

=》

$4x = 40$

=》

$x = 10$