without using trignoetric table evaluate; (3 cos 43/sin 47)2- cos 37 * cosec 53 / tan 5* tan 25 * tan 45 *tan 65 * tan 85
Answers
Answered by
197
(3cos43°/sin47°)²-cos37°cosec53°/tan5°tan25°tan45°tan65°tan85°
={3cos(90°-47°)/sin47°}²-cos37°cosec(90°-37°)/tan5°tan25°×1×tan(90°-25°) tan(90°-5°)
=(3sin47°/sin47°)²-cos37°sec37°/tan5°tan25°cot25°cot5°
=9-1
=8
={3cos(90°-47°)/sin47°}²-cos37°cosec(90°-37°)/tan5°tan25°×1×tan(90°-25°) tan(90°-5°)
=(3sin47°/sin47°)²-cos37°sec37°/tan5°tan25°cot25°cot5°
=9-1
=8
Answered by
89
Answer:
Step-by-step explanation:
Hope this will help you and others! !!
Attachments:
Similar questions