Question

find the value of sin²15°
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Answer 1

Step-by-step explanation:

sin²(45°-30°)

formula sin(x-y)= sinx cosy -cosy sinx

(sin45° cos30°-cos45° sin30°)²

(1/√2 * √3/2-1/√2*1/2)²

(√3/2√2-1/2√2)²

{(√3-1)/2√2}²

(3+1-2√3)/8

(4-2√3)/8

(2-√3)/4 ans.