sin 70 degrees into sin 20 degree minus cos 20 degree into cosec 70 degree
Aman singh thakur , 7 Years ago
Grade 10
Trigonometry> sin 70 degrees into sin 20 degree minus c...
2 AnswersVikas TU
Last Activity: 7 Years ago
.sec 70.sin 20 – cos 20. Cosec70
=1/cos 70 *sin(90-70)- cos(90-70).1/sin 70
=1/cos 70 * cos 70-sin 70 * 1/sin 70
=1-1
=0
manish raj
Last Activity: 6 Years ago
tan20degree+2tan50degree=====================================================================================================================================================================================================================================================================
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