Question

find the value of sec²30-Tan²30 ?​

Answer 1

Answer:

we know that

sec² thita - tan² thita = 1

here thita is same

so identity can be used & the value is 1

Alternate method

sec² 30° = 4/3

tan²30° = 1/3

So sec²30-Tan²30 ?= 4/3-1/3 = 1

Thus in any way the value of sec² 30° - tan² 30° = 1