Question

if cos 2 theta = sin 4theta where 2 theta and 4 theta acute angle find the value of theta​

Answer 1

Answer:

hii..

Step-by-step explanation:

given here:

late theta =x,

so,

cos 2x= sin 4x

bot we know that.

sin 2x =2 sin x cosx .

so,

. cos 2x= 2sin 2x cos 2x

. 2 sin 2x = 1

. sin 2x =1/2

. 2x = sin^-1(1/2)

. 2x= 30°

. x= 15°.

so actual value of x = 15°

I hopes its helps u.

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