Question

sin2 theta = cos( theta-30°)
find the value of theta​

Answer 1

Answer:

HOPE IT HELPS YOU

Step-by-step explanation:

given

theta=30°

apply theta =30° in the given question

that is

sin2(30°)=2sin30°.cos30°

sin60°= 2sin30°.cos30°

apply values

i.e,. √3/2=2(1/2).√3/2

√3/2= 2/2.√3/2

√3/2=1.√3/2

√3/2=√3/2

hence proved that sin2theta = 2 sin theta .cos theta.

PLS MARK AS BRAINLIEST

Answer 2

Step-by-step explanation:

sin2 theta = cos(theta-30)

sin2 theta =sin{ 90-(theta-30)}

sin2 theta = sin(90-theta +30)

sin2theta = sin (120-theta)

sin/sin 2theta+theta = 120

3theta =120

theta = 40°