Question

If SinB=1/2 , show that 3 Cos -4 cos(power of cos is 3)B=0

Answer 1

$hey \: dear \: here \: is \: ur \: answer \\ \\ given \: that \: sinb = 1 \div 2 \\ so \: b = 30 \\ putting \: this \: value \: in \: question \: \\ \\ 3 \times 1 \div 2 - 4( \frac{1}{2} )power3 \\ = \frac{3}{2} - 4 \times( \frac{1}8) \\ = \frac{3}{2} - \frac{1}{2} \\ = 1 \\ hope \: it \: will \: help \: you$

Answer 2

Answer:

your answer is in the above attachment

hope this helps u

mark me as brainlist