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sin 70 degrees into sin 20 degree minus cos 20 degree into cosec 70 degree

sin 70 degrees into sin 20 degree minus cos 20 degree into cosec 70 degree

Grade:10

2 Answers

Vikas TU
14149 Points
4 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
17 Points
4 years ago
tan20degree+2tan50degree=====================================================================================================================================================================================================================================================================

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