Solve the following:
cos²30°-sin²30°
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Answer:
7-2√3 divided by 4
Step-by-step explanation:
cos²30°-sin²30°
=> (cos 30°- sin 30)². { cos 30°=√3/2}
=> (√3/2-½)² { sin 30 ° = ½}
=>(√3-1÷2)²
=>(√3-1)²÷(2)²
=>(3+4 - 2√3 ÷4)
the answer is ( 7-2√3÷4)
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