cos37°sec37°/tan5°tan25°cot25°cot5°
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cos37°sec37°/tan5°tan25°cot5°cot25°
= 1/tan5°cot5°tan25°cot25°
【because secA=1/cosA
so sec37°=1/cos37°】
=1/1 【because cotA=1/tanA
so cot5°=1/tan5°
& cot 45°= 1/tan45°】
Therefore,
cos37°sec37°/tan5°tan25°cot5°cot25° = 1
= 1/tan5°cot5°tan25°cot25°
【because secA=1/cosA
so sec37°=1/cos37°】
=1/1 【because cotA=1/tanA
so cot5°=1/tan5°
& cot 45°= 1/tan45°】
Therefore,
cos37°sec37°/tan5°tan25°cot5°cot25° = 1
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