Question

the value of sin2 30degree -cos2 30dedree is​

Answer 1

Answer:

-1/2

Step-by-step explanation:

sin 30° = 1/2

so, sin^2 30° =(1/2)^2 = 1/4

similarly cos 30° = √3/2

so, cos^2 30° = (√3/2) ^2 = 3/4

Hence,

sin^2 30° - cos^2 30°

= 1/4 - 3/4

= (1-3) /4

= -2/4

= -1/2

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Answer 2

sin²30°-cos²30° = -1/2

Explanation:

please see the above image for better understanding