Question

Sine theta equal to 2sine theta then find the value of cos theta​

Answer 1

GIVEN :-

$\sf sin\theta=2sin\theta$

WE KNOW :-

$\sf sin\theta=2sin\theta \:\:\:when\:\:\theta=0$

WE HAVE TO FIND :-

• $\sf cos\theta$

$\sf\theta=0$

THEREFORE :-

$\sf cos\theta=cos0=1$

$\huge\boxed{\bf cos\:\theta=1}$

Answer 2

GIVEN :-

\sf sin\theta=2sin\thetasinθ=2sinθ

WE KNOW :-

\sf sin\theta=2sin\theta \:\:\:when\:\:\theta=0sinθ=2sinθwhenθ=0

WE HAVE TO FIND :-

\sf cos\thetacosθ

\sf\theta=0θ=0

THEREFORE :-

\sf cos\theta=cos0=1cosθ=cos0=1