Question

evaluate sin²60° +2 tan²45°-cos²40°​

Answer 1

Step-by-step explanation:

first put the value of sin60° ,tan45° ,cos30° .

sin60° = √3/2

tan45°=1

cos30°=√3/2

SO,

PUT THESE VALUES IN EQUATION:-

sin²60°+tan²45-cos²30

= (√3/2)²+(1)²-(√3/2)²

= 3/4 + 1 - 3/4 :• (√3)²=3 , (2) ²= 4

then,

1+1 = 2

this the answer.