Question

Find the value of 3 sin²20 - 2 tan²45+3 sin²70

Answer 1

Answer:

the value is 4..........

Answer 2

Answer:

1

Step-by-step explanation:

GIVEN IN THE QUESTION THAT,

3sin^2(20)-2tan^2(45)+3sin^2(70)

As we know that,

sin^2(20)=cos^2(70)

Hence,

3cos^2(70)+3sin^2(70)-2tan^2(45)

As we know that,

sin^2(A)+cos^2(A)=1 and tan(45)=1

Therefore,

3(1)-2(1)=1

HOPE IT IS HELPFUL TO U!