Math, asked by ganeshshelke1307, 1 year ago

sin 42° sec 48 ° + cos 42 ° cosec 48° =2

Answers

Answered by ShouryaGyanvarsha
25
sin 42° = cos 48°...... ¹
cosec 48° = sec 48°.....²
So, cos 48° sec48° + cos 42° sec 42° = 2
Answered by JackelineCasarez
3

Hence proved that sin 42° sec 48 ° + cos 42 ° cosec 48° = 2.

Step-by-step explanation:

To prove,

sin 42° sec 48 ° + cos 42 ° cosec 48° = 2

So,

by considering;

sin 42° sec 48 ° + cos 42 ° cosec 48°

⇒ sin 42° * sec(90° - 42°) + cos 42° * cosec(90° - 42°)

⇒ sin 42° * cosec42° + cos 42° * sec42°

⇒ sin 42° * 1/sin42° + cos42° * 1/cos 42°

by cancelling sin 42° with sin42° and cos 42° with cos42°, we get

⇒ 1 + 1 = 2

Hence proved that

sin 42° sec 48 ° + cos 42 ° cosec 48° = 2

Learn more: Trigonometry

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