Question

sin square 10 + sin square 80 / sec square 20 - cot square 70​

Answer 1

Answer:

sin square 10+sin square(90-10)/sec square20-cotsquare(90-20)

sin square 10+ cos square 10/sec square20 -tan square 20

(sin(90-@)=cos@)

cot(90-@)= tan@

sin square@+cos square @=1

sec square@-tan square@=1

sin square 10+cos square 10/ sec square 20-tan square 20=1/1=1