Question

If cosA=root3/2,than find the value of sin2A

Answer 1

Answer:

Sin2A = √3/2

Step-by-step explanation:

One should learn values of Cos and Sin of 0° , 30° , 45° , 60° and 90°

Given, CosA = √3/2

CosA = Cos30°

A = 30°

Sin2A = Sin60° = √3/2

I Hope this will Help You.

Answer 2

The value of sin2A is given by $\frac{ \sqrt{3}}{2}$

Step-by-step explanation:

It has been given that

$\cos A =\frac{ \sqrt{3}}{2}$

The value of cosine function is $\frac{ \sqrt{3}}{2}$ at Ф= 30°

Therefore, we have

$A =\cos^{-1}(\frac{ \sqrt{3}}{2})\\\\A=30^{\circ}$

Using this value we can easily find the value of sin2A

sin 2A

Substituting the value of A

sin 2 (30°)

= sin (60°)

$\frac{ \sqrt{3}}{2}$

#Learn More:

Find the value of sin2A when cosA=3/5

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