Q) Evaluate the following pls sec 70 sin 20 +cos 20 cosec 70 - Maths - Trigonometry

Question

Q) Evaluate the following pls
s e c   70 °   sin   20 ° + cos   20
°   cos e c   70 °

Shruti Tyagi · Accepted Answer

Dear student,

We have,sec70°sin20°+cos20°cosec70°we know that sec90-θ=cosecθ and cosec90-θ=secθ= sec90-20°sin20°+cos20°cosec90-20°=cosec20°sin20°+cos20°sec20°=1sin20°×sin20°+cos20°×1cos20°=1+1=2

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Q). Evaluate the following pls s e c 70 ° sin 20 ° + cos 20 ° cos e c 70 °

Q). Evaluate the following pls
$s e c 70 ° \sin 20 ° + \cos 20 ° \cos e c 70 °$