Find the Value of Sin 270 * Cos 180
Sin 270 * Cos 180 =?
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Sin 270° = —1
Cos 180° = —1
Sin 270° × Cos 180° = —1 × —1 = 1
Cos 180° = —1
Sin 270° × Cos 180° = —1 × —1 = 1
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Answer:
Your answer is
(-cosA)(-cosA)= cos^2A=1-sin^2A
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