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Evaluate Sin 18°/cos 72°

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Evaluate Sin 18°/cos 72°

Posted by Muhammad Faizan 6 years, 3 months ago

CBSE > Class 10 > Mathematics

3 answers

Shaik Haneef 6 years, 3 months ago

Sin (90-72) / cos72 Cos 72/cos72 1

Yogita Ingle 6 years, 3 months ago

Sin 18°/cos 72°
= Sin18°/cos (90° - 18° )
= sin18°/sin18°
= 1

Ujjwal Kumar Choubey 6 years, 3 months ago

1

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