Math, asked by sai000prakash, 5 months ago

Evaluate sec 70⁰ sin 20⁰ + cos 20⁰ cosec 70⁰ is equal to *

Answers

Answered by lspfdnr

3

Answer:

0

Step-by-step explanation:

sec 70° sin 20-cos20 cosec 70

= cosec (90-70) sin 20- cos20 sec (90-70)

=1/sin20× sin 20+cos 20×1/cos20

=1-1

=0

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