Math, asked by kumarirachna748, 2 months ago

sec 70 sin 20+ sec 20 sin 70 =2

Answers

Answered by snehasishto1996

0

Answer:

2

Step-by-step explanation:

L.H.S. = Sec70 Sin 20 + Sec20. Sin70

= Cosec (90-70) .Sin 20 + Cosc(90-20) Sin70

= Cosec 20 Sin 20 + Cosec 70 Sin 70

= (1/Sin20 )*Sin 20 + (1/sin 70)*sin 70

=1+1

= 2

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