Question

sec²60-tan²60÷sin²30+cos²30​

Answer 1

Answer:

sin² 30 + cos² 150 + tan² 60. = sin² 30 + cos²(180-30) + tan² 60. = sin² 30 + cos²30 + tan² 60. = 1 + tan² 60 = 1/cos²60 = sec²60.

Step-by-step explanation:

Answer 2

Answer:

1

Step-by-step explanation:

given

sec²60-tan²60÷sin²30+cos²30

[ since sec²theta - tan² theta=1

sin²theta +cos²theta=1]

if we assume that theta=60 and theta =30 in numerator and denominator respectively

Then 1÷1=1