A = 30⁰ then value of cos² A – sin² A is?
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Answer:
1/2
Step-by-step explanation:
==: cos² A – sin² A
==: cos² 30 – sin² 30
==: (√3/2)² - (1/2)²
==: 3/4 - 1/4
==: 2/4
==: 1/2
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