Prove that Cos10°-sin10°/cos10°+sin10°=tan35°
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Cos10-Sin10/cos10+sin10
Divide numr. and denominator by cos10 u will get 1-tan10/1+tan10 which is equal to tan45-tan10/1+tan45tan10
= tan35
Divide numr. and denominator by cos10 u will get 1-tan10/1+tan10 which is equal to tan45-tan10/1+tan45tan10
= tan35
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