Hitung lahkak mohon bantuannya ya
sin⁻¹ (-1)= a
sin a = – 1
sin a = - sin 90
a= 270
cos⁻¹ (1/2 √2) = b
cos b = 1/2 √2
cos b = cos 45
b= 45
cot(a + b) =
Hitung lahkak mohon bantuannya ya
sin⁻¹ (-1)= a
sin a = – 1
sin a = - sin 90
a= 270
cos⁻¹ (1/2 √2) = b
cos b = 1/2 √2
cos b = cos 45
b= 45
cot(a + b) =